CANDLE CONTAINER Field of the disclosure The present disclosure relates to candle containers and methods for manufacturing the same. More specifically, the disclosure relates to a candle container and methods for fastening a wick in a candle container. Background art Candles, such as tealights, are today manufactured in large volumes, and the manufacturing processes of the candle containers, also referred to as candle holders, are of importance in order to optimize material usage, time requirements, quality and costs. Various ways in which candle containers are assembled, such as how to attach a wick and create the shape of the candle container, is known in the art today. Typically, e.g. for tealights, the candle container is made of aluminium and a separate wick holder made of steel is fastened to the bottom of the candle container by means of an adhesive. The wick holder generally comprises a portion which clamps the wick such to hold it in place when material is poured into the container to form a candle. A problem with this type of candle container is its environmental impact, containing both aluminium and steel which is often not taken care of correctly for recycling after use. For a correct recycling, the wick holder of steel must be separated from the candle container of aluminium when disposed of, such that the materials can be recycled separately under conditions suitable for the respective material. This is something of which many users are unaware. Additionally, the manufacturing process for such candle containers comprises several steps. Some prior art documents describe manufacturing processes in which a wick is directly inserted into the container and attached thereto by applying an adhesive material. One example of this is described in WO9847772, where a method describes how a liquid fixation mass is inserted into an opening of a candle container, a wick is inserted and the mass solidifies around the wick. Another type of manufacturing method, described in US2014239547, comprises inserting a wick into the container, and applying an ignitable mass at a temperature just below its solidification point around the wick. A challenge that arises when assembling the candle containers is, for example, how to optimize the design of the candle container itself, in order to facilitate the production, while still producing high quality candle containers, and reducing the enviromental impact. In conjunction with this, the manner in which the candle container is produced may also be optimized. Thus, a problem that occur with current candle containers and manufacturing methods are, for example, that the attaching of the wick requires intricate and to some extent inefficent processes. Summary It is an object to mitigate, alleviate or eliminate one or more of the above-identified deficiencies in the art and disadvantages singly or in any combination and solve to at least one of the above mentioned problems. According to a first aspect of the disclosure, there is provided a candle container comprising a base extending substantially in a base plane. The base comprises a recess which is configured to receive a wick therein. The recess comprises recess walls extending at an angle from the base plane. Furthermore, a width of the recess is reducible such that a portion of a wick is fastenable therein as the width of the recess is reduced. By providing a candle container with a recess, in which the wick is fastenable, wherein a width of the recess is reducible, a wick may be fastened inside the recess. Thus, the candle container is advantagous in that it allows a wick to be fastened directly to the candle container using only mechanical means. That is, no separate wick holder is required to fasten a wick to the candle container. It it is to be understood that any width of the recess may be reduced in order to fasten a wick therein. Furthermore, the candle container is advantageous in that it is easier to manufacture, since fewer devices and/or operations are required to fasten a wick therein. Additionally, fewer kinds of material are needed to fasten a wick to the candle container. Furthermore, the candle container is advantageous in that it provides a more secure fastening of a wick. According to an embodiment, the base comprises a cellulose material. This is advantageous in that the candle container is manufactured in a sustainable manner, using a sustainable material. Furthermore, using a cellulose material for the base is advantageous in that it provides a more environmentally-friendly candle container, e.g. because it is compostable and thus easy to recycle, and requires less energy for its manufacture than many other materials conventionally used as candle containers. Furthermore, the cellulose material is flexible, allowing the candle container to be formed into a desired shape. The cellulose material may for example be any raw material including any cellulosic fibers or fines. The cellulosic fibers may be, for example, wood, bagasse, hemp, flax, cotton, abaca, sisal and jute. Although this is a preferred embodiment, in view of the aforementioned advantages, it is also conceivable, within the concept of the present disclsoure, to provide a base of another material suitable for a candle container. I.e. the base may comprise a material which is heat and flame resistant such that it can hold a combustible material, e.g. stearine and/or paraffin, in liquid and solid state without deteriorating. According to an embodiment, at least a portion of the recess walls are integrateable with a portion of the wick. I.e. portions of the recess walls can blend into a portion of the wick and thereby form a mechanical engagement of the portion of the recess walls with the portion of the wick. This provides a more secure fastening of the wick to the candle container. Thanks to the more secure and reliable fastening, the candle container provides a more aesthetically pleasing and consistent lighting, since the wick will remain in a desired position. The desired position may for example be in the centre of the base, or in any other position suitable for arranging a wick in a candle container. Furthermore, the candle container will thereby provide a more safe candle container since the position of the wick will be more controlled. For example, the wick may be kept apart from other parts of the candle container. This is also particularly advantageous when manufacturing a candle and specifically during the step of adding material to the candle container so as to form the candle, during which the wick will be securely held in its desired position. According to an embodiment, the candle container further comprises a set of feet configured to protrude from the base. By “a set of feet”, it is here meant, but not limited to, any kind of support element which may raise the candle container, and more particularly the base, from the ground or any surface on which it is placed. This is advantageous in that e.g. the candle container is safer, since a part of the candle container will be kept distant from the exterior surface it is standing on. For example, when the wick is lit, the candle container may radiate heat, which can be kept further away from the surface on which it stands, thus decreasing the fire hazard and risk of damage caused by heat. Furthermore, this embodiment is advantageous in that the base may be raised, allowing the base to change shape/deform without having the surface it stands on interfere with the candle container, resulting in e.g. undesired tilting and unstability. According to an embodiment, the candle container further comprises walls, wherein the walls extend from the periphery of the base in a direction substantially perpendicular to the base plane. That is the walls extend from the periphery of the base in a direction perpendicular to the base plane, or at an angle to the base plane such that the base and the walls form a container having an open end. This is advantegous in that the candle container may be filled with more meltable mass to form a candle, and it provides a more durable and stable structure. According to an embodiment, the base comprises a heat resistant material at the recess. It is to be understood that by “heat resistant material” it is meant a material which is resistant to heat and/or flames, i.e. protects the base from bursting into flames or being damaged. Thus, this is advantageous in that the risk of the base being damaged, or compromised in any way, due to the heat, is reduced. According to an embodiment, the recess perforates the base. This is advantageous in that a wick may be inserted from any side of the base plane. Thus, this embodiment provides a versatile candle container, in terms of how to manufacture it. This is further advantageous in that the wick, once inserted in the recess which perforates the base, will remain in place without moving in a veritcal direction when recess the walls are moved towards each other such to reduce the width of the recess to fasten the wick therien. According to an embodiment, the candle container comprises a fastening portion, wherein the fastening portion has a conical shape and the recess is arranged at the apex of the conical shape of the fastening portion. This is advantageous in that the mechanical attachment of the wick is improved. Furthermore, a conical shape is a durable structure, which improves the stability of the wick and the candle container as a whole. Further, a conical shape may be rotationally symmetric, which also increases durability and reliability of the fastening portion and the candle container. It is to be understood that the fastening portion may constitute the whole base or a portion of the base. It is also possible to provide a candle container with a base comprising a plurality of fastening portions, wherein each fastening portion is configured to fasten at least one wick. In an embodiment, each fastening portion is configured to fasten a plurality of wicks. The candle container comprising a fastening portion having a conical shape provides the option of pushing on the fastening portion in a direction substantially perpendicular to the base plane, such to flatten the conical shape, whereby a width of the recess is reduced and a wick is fastenable therein. According to an embodiment, changing the angle of a lateral surface of the fastening portion with respect to the base plane changes a width of the recess, such that a portion of a wick is fastenable therein. This is advantageous in that it allows the fastening portion to be pushed in a direction substantially perpendicular to the base plane, and thus change the shape of the fastening portion and thereby reduce a width of the recess, in order to fasten the wick. This is advantageous in that it makes the fastening of the wick less complex and more secure. According to an embodiment, the fastening portion comprises a plurality of grooves arranged at least partially in a radial direction of the conical shape. This is advantageous in that the fastening portion becomes more durable and changing shape is facilitated, thus improving the fastening of the wick. According to an embodiment, the fastening portion is arrangeable in a first and a second state, wherein in the first state the fastening portion has a conical shape and the recess has a first width, and wherein in the second state the fastening portions has a substantially flattened shape and the first width of the recess is different than in the first state, such that a portion of a wick is fastenable in the recess in at least one of the first and second states. This is advantageous in that fastening a wick in the fastening portion is facilitated. Further, this is advantageous in that the wick may be fastened by pushing or pressing the fastening portion in a direction substantially perpendicular to the base plane. According to an embodiment, the first width is smaller in the second state than in the first state, such that a portion of the wick is fastenable in the recess when the the fastening portion is arranged in the second state. This allows the wick to be fastened by pushing on the fastening portion or on the candle container walls, in a direction substantially perpendicular to the base plane such to flatten the conical shape of the first state, whereby the first width of the recess is reduced. According to an embodiment, the first width is smaller in the first state than in the second state, such that a portion of the wick is fastenable in the recess when the the fastening portion is arranged in the first state. This allows the wick to be fastened by pushing on the fastening portion or on the candle container walls, in a direction substantially perpendicular to the base plane moving the fastening portion from a substatially flat shape to a substantially conical shape, whereby the first width of the recess is reduced. According to a second aspect of the disclosure, there is provided a method for fastening a wick in a candle container. The method comprises the step of providing a candle container. The candle container comprises a base extending substantially in a base plane. The base further comprises a recess wherein the recess comprises recess walls extending at an angle from the base plane. The method further comprises the step of arranging a portion of a wick in the recess such that the wick protrudes from the recess on a wick side of the base. The method further comprises the step of reducing a width of the recess so as to fasten the portion of the wick therein. The method for fastening a wick in a candle container is advantagous in that it improves the fastening of the wick in the candle container. Firstly, because the method may reduce a width of the recess to fasten the wick therein. Therefore, the method may use mechanical work to fasten the wick. Secondly, because it provides a more secure fastening of the wick in the recess. Furthermore, the method for fastening is advantageous in that it is easier. Furthermore, the method for fastening is advantageous in that it requires fewer devices and fewer kinds of material to manufacture the candle container and to fasten the wick in the candle container. For example, no separate wick holder is needed, whereby both material use and processing steps for the manufacturing of the candle container is reduced. According to an embodiment, the step of reducing the width of the recess comprises pressing the recess walls towards each other from a direction at least partially parallel with the base plane. This is advantageous in that it provides a way to fasten the wick in the candle container which only requires mechanical work. In another embodiment, in which the recess has a width that is smaller than a width or diameter of the wick and the material of which the candle container is made is elastic, the step of reducing the width of the recess comprises pressing the wick into the recess from any side of the base plane, whereby the recess will first expand and then, when arranged at a desired depth in the recess, be reduced as a consequence of the material of the recess walls exerting a force against the wick portion in contact therewith as the recess has been expanded. According to an embodiment, the pressing of the recess walls is performed from the wick side of the base. This is advantageous in that it provides a way to perform the fastening of the wick in the candle container from the wick side. Furthermore, this allows the wick to be fastened without being inserted from the side of the base opposite to the wick side of the base. Hence, the recess does not have to perforate the base and the wick may be unseen from the side of the base opposite to the wick side of the base, i.e. from below when the candle container is arranged on a surface. Thus, the present embodiment may provide a more aesthetically pleasing design. According to an embodiment, the pressing of the recess walls is performed from a side of the base which is opposite to the wick side. This is advantageous in that is provides a way to perform the fastening of the wick in the candle container from a side of the base which is opposite to the wick side. Furthermore, this is advantageous in that it is easier to perform the pressing from outside the container, instead of from inside the container on the wick side of the base. Further, this provides flexibility in terms of which means and methods that may be used when pressing the recess walls. According to an embodiment, the step of reducing a width of the recess comprises pushing at least a portion of the base in a direction substantially perpendicular to the base plane. This is advantageous in that it provides a way to fasten the wick in the candle container by simply pushing or pressing the base or a portion of the base either towards or away from the base plane. According to an embodiment, the pushing comprises pushing a conical portion, comprised in the base, located around the recess, such that an angle of the lateral surface of the conical portion is changed with respect to the base plane. According to an embodiment, the method comprises the step of adding a heat resistant material at the recess before, and/or after, the step of reducing a width of the recess. This embodiment is advantageous in that the base is better protected from heat, and the wick may be fastened more securely to the recess. According to an embodiment, the step of reducing a width of the recess further comprises the step of integrating a portion of the base with a portion of the wick.This is advantageous in that the fastening of the wick is more secure. This is further advantageous in that less material may be used to fasten the wick. Effects and features of the second aspect are largely analogous to those described above in connection with the first aspect. Embodiments mentioned in relation to the first aspect are largely compatible with the second aspect. It is further noted that the inventive concepts relate to all possible combinations of features unless explicitly stated otherwise. A further scope of applicability of the present disclosure will become apparent from the detailed description given below. However, it should be understood that the detailed description and specific examples, while indicating preferred embodiments of the disclosure, are given by way of illustration only, since various changes and modifications within the scope of the disclosure will become apparent to those skilled in the art from this detailed description. Hence, it is to be understood that this disclosure is not limited to the particular component parts of the device described or steps of the methods described as such device and method may vary. It is also to be understood that the terminology used herein is for purpose of describing particular embodiments only, and is not intended to be limiting. It must be noted that, as used in the specification and the appended claim, the articles "a", "an", "the", and "said" are intended to mean that there are one or more of the elements unless the context clearly dictates otherwise. Thus, for example, reference to "a unit" or "the unit" may include several devices, and the like. Furthermore, the words "comprising", "including", "containing" and similar wordings does not exclude other elements or steps. Brief descriptions of the drawings The disclosure will by way of example be described in more detail with reference to the appended schematic drawings, which show presently preferred embodiments of the disclosure. Figures 1a-b show cross-section views of the candle container according to two different embodiments of the present disclosure. Figures 2a-b show perspective partly cross-sectional views of the candle container according to an embodiment of the present disclosure. Figures 3a-c show cross-sectional views of the candle container, and a method for fastening a wick in the candle container, according to an embodiment of the present disclosure. Figures 4a-c show cross-sectional views of the candle container, and a method for fastening a wick in the candle container, according to an embodiment of the present disclosure. Figure 5 shows a perspective view of the candle container according to an embodiment of the present disclosure. Detailed description The present disclosure will now be described more fully hereinafter with reference to the accompanying drawings, in which currently preferred embodiments of the disclosure are shown. This disclosure may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided for thoroughness and completeness, and to fully convey the scope of the disclosure to the skilled person. Figure 1a shows a cross section of a candle container 1 in accordance with an embodiment of this disclosure. The candle container 1 comprises a base 2 extending at least partially in a base plane A. The base 2 has in this embodiment a disc shape which extends substantially in the base plane A. It is, however, conceivable within the context of the present disclosure to provide a base which has the shape of a square, a rectangle, an oval, or any other for the purpose of providing a base for a candle container suitable shape. The base 2 comprises a recess 3, wherein the recess 3 is arranged in the center of the base 2. Further, the recess 3 is configured to receive a wick 4. In this exemplifying embodiment, the recess 3 perforates the base 2, whereby the wick 4 may be inserted from any side of the base plane A. In other words, the wick 4 may be recieved from a wick side of the base 2, or from a side opposite to the wick side of the base 2. The wick side of the base 2 may be understood as the side of base 2 at which the majority of the wick 4 will be arranged, i.e. inside the candle container. The wick side of the base 2 may also be understood as the side of the base 2, on which the wick 4 will burn when in use. The wick side of the base 2 may be the surface facing away from a surface on which the candle container 1 is placed. The recess 3 comprises recess walls 5 extending at an angle from the base plane A. The recess walls 5 protrude from the base 2 and may have various shapes. The recess walls 5 may be a continuous circular wall, i.e. forming a tubular shape around the recess 3. The recess walls 5 may be any protruding structure circumferentially arranged around the center of the base 2, in which a recess 3 is arranged. In some embodiments, the recess walls 5 may protrude from the base 2 and/or be integrated with the base 2. For example, in an embodiment, only a part of the recess walls 5 protrude from the base 2. In another embodiment, no part of the recess walls 5 protrude from the base 2. Instead, the recess walls form part of the base 2 and defines a recess having a width that is smaller than a width of a wick that is to be inserted therein. In this embodiment, the recess walls 5 may only protrude slightly from the base 2, or not at all, when a wick having a width or diameter that is slightly larger than the width or diameter of the recess is inserted in the recess. A width of the recess 3 is reducible, such that a portion of a wick 4 is fastenable therein as the width of the recess 3 is reduced. Any width of the recess 3 may be reduced in order to squeeze, jam, clamp, and/or hold a wick 4 in place, and thereby fastening it in the recess 3. For example, the recess 3 may be oval shaped, allowing the width across the shortest dimension of the oval shape to be reduced for fastening of the wick 4. The recess 3 may have different shapes. For example, the recess 3 may be oblong, oval, rectangular or square-shaped. Furthermore, the recess 3 may have a circular shape, for which a width in any direction is reducible, allowing the wick 4 to be fastened by reducing any width of the recess 3. Furthermore, a width of the recess 3 may always be less wide than the shortest width of the wick 4, such that the wick 4 may be squeezed into the recess 3. Thus, allowing the wick 4 to be fastened due to the flexibility of the recess 3 and/or the wick 4. In Fig.1a the recess walls 5 extend substantially in a direction perpendicular to the base plane A. In Fig.1a, the recess walls 5 extend in a direction towards the wick side of the base 2. In Fig.1b, another embodiment of the candle container 10 is shown in cross-sectional view. In this embodiment, the recess walls 5 extend in a direction towards the side of the base 2 opposite to the wick side of the base 2. This is advantageous in that combustible material added later to the candle contiainer 10 to form a candle will be in direct contact with the wick. Thereby, no part of the candle container 10 will be present between the wick and the combustible material, e.g. stearine or paraffin, when the candle is about to burn out, and will thus not ignite. Further, in the embodiment shown in Fig.1b, the base 2 is slightly angled with respect to the base plane A, allowing the recess walls 5 to extend in a direction towards the side of the base 2 opposite the wick side of the base 2, in a space below the candle container 10, without engaging with a surface that the candle container 10 may be placed on. This allows the candle container 10 to be placed on a surface without e.g. tipping due to the recess walls 5 engaging with the surface it is placed on. Further, in this embodiment the recess 3 perforates the base 2, whereby a wick 4 may be inserted in the candle container 10 from any side of the base plane A. However, it is also conceivable within the context of the present disclosure to provide a recess which does not perforate the base 2, as will become clear from the further description of embodiments, particularly with respect to Figs.2 and 4. For such embodiments, a wick 4 is insertable into the recess 3 from the wick side of the base 2 only. Figure 2a and 2b show the candle container 11 in accordance with another embodiment of this disclosure. The candle container 11 comprises a base 2, wherein the base 2 comprises a fastening portion 8, wherein the recess 3 is arranged at the center of the fastening portion 8. The fastening portion 8 is arrangeable in a first state in which it is has a conical shape, shown in Fig.2a, and in a second state in which it has a substantially flat shape, shown in Fig.2b. In an embodiment, the fastening portion 8 may, in a first state comprise a conical shape, and in the second state, also comprise a conical shape, wherein the apex of the conical shape in the second state is on the opposite side of the base 2 compared to the apex of the conical shape in the first state, i.e. the apex of the conical shape in the second state may be on the side opposite to the wick side of the base 2. The base 2 may change shape and/or position by e.g. pushing or pressing means, resulting in the fastening portion 8 going from the first state to the second state. The pressing and/or pushing means may be any kind of machine, tool or actuator used for engaging with the base 2 and pushing it in a direction substantially perpendicular to the base plane A. The pressing means may be manually, pneumatically or hydraulically operated. It is to be understood that the candle container 11 may be pushed with respect to the fastening portion 8, in a direction substantially perpendicular to the base plane, in order to reduce the first width of the recess 3, instead of the fastening portion 8 being pressed and/or pushed upon. In other words, the pushing and/or pressing means may engage with the candle container 11 instead of the fastening portion 8, in order to reduce the first width. It is to be understood that the fastening portion 8 may constitute the whole base 2 or a portion of the base 2. Further, it is to be understood that the fastening portion 8 may comprise other shapes than conical shapes. For example, the fastening portion 8 may have a pyramid shape, i.e. a polyhedron for which the base is a polygon and all lateral faces are triangles. Furthermore, the base 2 may comprise a plurality of fastening portions 8, wherein each fastening portion 8 is configured to have a recess 3, wherein the recess 3 is configured to receive at least one wick. Furthermore, each recess 3 may be configured to receive more than one wick. In Figs.2a-b, the candle container 11 further comprises walls 7. The walls 7 extend from the periphery of the base 2 in a direction substantially perpendicular to the base plane A. Here, the walls 7 comprises a tubular shape which extends from the outer edge of the base 2. The walls 7 may be used for keeping stearine or paraffin, added to the candle container such to form a candle, inside the candle container, wherein the stearine or paraffin may be used as a combustible material. It is to be understood that the shape of the walls 7 may vary, and may for example be conically shaped, i.e. being at an angle with respect to the base plane A. Furthermore, the candle container 11 comprises a set of feet 6 which protrude from the base 2. The set of feet 6 extends from the side of the base 2 which is opposite to the wick side of the base 2, in a direction which is at least partially perpendicular to the base plane A. In the exemplifying embodiment shown in Figs.2a-b, the set of feet 6 is composed of four feet 6 (whereof only 3 are shown) which protrude from the base in a direction away from the wick side of the base 2. An advantage with providing a set of feet 6 comprising several feet portions as shown here is that, when using the candle container to hold a candle, less combustible material such as stearine will remain unused in the feet 6 when the candle has burned out, as opposed to for a candle container wherein the set of feet extendes along the entire perphery of the base. However, in other embodiments, the walls 7 and/or the base 2 may form the set of feet 6. The set of feet 6 may be the outer perimeter of the base 2 when the base is sufficiently angled with respect to the base plane A. An exemplifying embodiment in which the base 2 is used as a set of feet 6 is shown in Fig. 1b. Further, in Figs.2a-b the recess 3 is in the shape of a cup, with an opening towards the wick side of the base 2, but closed towards the side of the base 2 opposite to the wick side. In other words, the wick side of the base 2 may face a direction opposite to the direction in which the set of feet 6 protrude from the base 2. The recess 3 further comprises recess walls 5, wherein the recess walls 5 extend essentially from the center of the fastening portion 8 towards the side of the base 2 opposite to the wick side. In an alternative embodiment, the base 2 may be square shaped. If the base 2 is square-shaped, the walls 7 extending from the the periphery of the base 2 may have a square shape corresponding to the square shape of the base 2. Furthermore, the fastening portion 8 comprises a plurality of grooves 9. The grooves 9 may be arranged at least partially in a radial direction from the center of the fastening portion 8. The grooves 9 makes a transition from the first state to the second state for the fastening portion 8 easier. Furthermore, the grooves 9 allow the base 2 and the fastening portion 8 to be more durable, since the grooves 9 allow the base 2 and the fastening portion 8 to change shape/deform in a less compromising manner, when e.g. a pressure is applied on the the fastening portion 8. This may be particularly beneficial in embodiments wherein the base is made from a material comprising a cellulose material, as improved flexibility combined with improved durability may counter disadvantages that may otherwise be provided by using a material comprising a cellulose material. Furthermore, the grooves 9, allow the deformation, that occurs when the fastening portion 8 transitions between the first and second state, to be of a greater extent without compromising the structural integrity of the fastening portion 8 and the base 2. In Fig.2a, the fastening portion 8 comprises a conical shape and is in the first state, wherein the recess 3 is arranged at the apex of the conical portion, and is configured to receive a wick. The recess walls 5 extend from the apex of the conical portion. In Fig.2a, the recess 3 has a first width, w ₁ , when it is configured to receive a wick. In Fig.2b, the fastening portion 8 comprises a substantially flat or flattened shape, and is in the second state. The fastening portion 8 in the second state, as illustrated in Fig.2b, has changed shape when compared to the shape of the fastening portion 8 in the first state, as illustrated in Fig.2a. The first width, w ₁ , of the recess 3 is smaller when the fastening portion 8 is in the second state than when the fastening portion 8 is in the first state. The recess 3 is thus configured to receive a wick in the first state, and to fasten a wick therein in the second state. Figures 3a-c show cross-sectional views of an embodiment of the candle container 12 with some similarities to the embodiment described with reference to Fig.1a, and a method for fastening a wick 4 in the candle container 12, in accordance with an embodiment of the present disclosure. The candle container 12 comprises a base 2 extending substantially in a base plane A. The base 2 comprises a recess 3, wherein the recess 3 comprises recess walls 5 extending at an angle from the base plane A. Furthermore, the candle container 12 comprises a set of feet 6. Figures 3a-c illustrate the method of fastening a wick 4 in the candle container 12. Fig.3a illustrates how a candle container 12 is provided, and a wick 4 is arranged in the recess 3, wherein the wick 4 was inserted from the side of the base 2 opposite to the wick side of the base 2. Further, Fig.3b illustrates how a width of the recess 3 is reduced to fasten the wick 4. The reduction in a width of the recess 3 may be caused by the recess walls 5 being pushed towards each other in at least one direction. Fig.3a shows the candle container 1 with a portion of a wick 4 arranged in the recess 3 such that the wick 4 protrudes from the recess 3 on a wick side of the base 2. The recess 3 perforates the base 2, allowing the wick 4 to be inserted from the side opposite to the wick side of the base 2. The wick 4 may also be inserted from the wick side of the base 2, i.e. the wick may be received in the recess 3 from the wick side of the base 2. Fig.3b shows the step of reducing a width of the recess 3 so as to fasten the portion of the wick 4 therein. Here, the reducing of the width of the recess 3 comprises pressing the recess walls 5 towards each other from a direction at least partially parallel with the base plane A. The pressing may be performed using any pressing means, such as any machine, tool or actuator. The pressing means may be manually, pneumatically or hydraulically operated. The pressing may also be performed using springs. Fig.3c shows the candle container 12, wherein heat resistant material 15 has been added to the base 2. The heat resistant material 15 may be arranged around the recess 3 in order to more firmly secure the wick 4, as well as to provide heat protection for the base 2. The heat resistant material 15 may be arranged on the whole base 2, or any part of the base 2. Furthermore, the heat resistant material may be arranged anywhere on the interior of the candle container 12. The heat resistant material 15 may be added before the candle container 12 received the wick. The heat resistant material 15 may alternatively be added before, during and/or after the width of the recess 3 has been reduced. The heat resistant material 15 may be a material that protects the base 2 from heat and flames, and may comprise e.g. glue or cement. The glue may be flame retardant. Figures 4a-c show cross-sectional views of the candle container 13 according to an embodiment of the disclosure, and a method for fastening a wick 4 in the candle container 13, in accordance with an embodiment of the present disclosure. Figs.4a-c illustrates a candle container 13 which has some similarities to the candle container 12 and the method described with reference to Figs.3a-c. As many features of the configuration and operation of the candle container 13 may be substantially similar to that described with reference to Figs.3a-c, a detailed description of features common to the embodiment illustrated in Fig.3a-c has been omitted for the sake of brevity and conciseness. The candle container 13 in Figs.4a-c comprises a base 2 with an indentation 16 at and/or around the recess 3. There may be one large indentation 16 arranged circumferentially around the recess 3, and/or there may be a plurality of indentations 16 arranged around the recess 3. In Fig.4a the base 2 comprises heat resistant material 15, and the heat resistant material 15 may be arranged at the recess 3, in the indentation 16, and/or in the recess 3 itself. In Fig.4b, the candle container has received a wick 4, and in Fig.4c, the reducing of a width of the recess 3 is illustrated, wherein the reduction of a width is performed from below the base plane A, i.e. from the side of the base 2 opposite to the wick side of the base 2. Figure 5 shows a candle container 14 in accordance with an embodiment of this disclosure. Fig.5 illustrates a candle container 14 which has some similarities to the candle container 11 described with reference to Figs.2a-b. As many features of the configuration and operation of the candle container 14 is substantially similar to that of the embodiment described with reference to Fig.2a-b, a detailed description of features common to the embodiment illustrated in Fig.2a-b has been omitted for the sake of brevity and conciseness. In the exemplifying embodiment shown in Fig.5, the candle container 14 comprises a fastening portion 8. The fastening portion 8 comprises recess walls 5 defining the recess 3, wherein the recess walls extend from the fastening portion 8, at an angle from the base plane A. The recess walls 5 of this embodiment extend upwards, and protrude from the fastening portion 8, towards the wick side of the base 2. The recess walls 5 further comprises four sections, wherein each section is separated by the grooves 9. It is to be understood that the recess walls 5 may constitute one section, or a plurality of sections of different sizes and shapes. For example, at least one of the sections of recess walls 5 may be different from at least one other section. The candle container 14 is in Fig.5 shown in its first state, in which the fastening portion 8 has an essentially conical shape. By pressing the fastening portion 8 into a second state, in which the shape of the fastening portion 8 is flattened, a width of the recess 3 is reduced such that a portion of a wick may be fastened therein. The recess 3 of the candle container 14 is thus reducible such that a portion of a wick is fastenable therein as a width of the recess is reduced. In an alternative embodiment, the recess walls are arranged as described with reference to Fig.5 and the fastening portion is arranged in a substantially flat shape in a second state. The fastening portion may be moved into a first state in which the fastening portion has a conical shape with cone shape defining walls sloping downwards in a direction towards the side of the base which is opposite to the the wick side of the base. By moving the fastening portion from the second state, in which the fastening portion is substantially flat, to the first state, in which the fastening portion has a conical shape, a width of the recess is reduced such that a wick is fastenable therein. In yet another embodiment, the fastening portion is arrangeable in a first state, in which the fastening portion has a substantially conical shape as shown in Fig.5, and in a second state, in which the fastening portion also has a conical shape but in which the conical shape is inverted with respect to the conical shape of the first state. An advantage with providing a candle container in which the fastening portion has a conical shape with the apex of the conical shape pointing in a direction which is opposite to the direction in which the wick protrudes from the recess when fastened therein, is that combustible material added to the candle container such to form a candle, e.g. paraffin or stearine, will flow towards the wick when melted such that most of it will burn. For the same reason, it is advantageous to provide a candle container comprising a base which has a substantially conical shape wherein the apex of the conical shape is directed away from the direction in which the wick protrudes from the recess. While some embodiments described herein as having similarities to other embodiments, it will be appreciated that each presented embodiment of a candle container comprises a base extending substantially in a base plane, the base comprising a recess which is configured to receive a wick therein, wherein the recess comprises recess walls extending at an angle from the base plane, and wherein a width of the recess is reducible such that a portion of a wick is fastenable therein as the width of the recess is reduced. Any mention of similarities are only provided to highlight that certain features do not need to be re-explained. The person skilled in the art realizes that the present disclosure by no means is limited to the preferred embodiments described above. On the contrary, many modifications and variations are possible within the scope of the appended claims. For example, the base of the candle container may take on various shapes, and may comprise indentations, wherein e.g. some indentations may be configured to receive heat resistent material. Furthermore, a fastening portion of the base may be shaped in other ways, such as squares. The candle container may comprise several fastening portions arranged at the base of the candle container in any pattern, as desired and feasable from a security and easthetic aspect. Furthermore, although the recess and the fastening portion have been arranged in a central position of the candle container in the embodiments described with reference to the figures disclosed herein, arranging the recess or the fastening portion at a non- central position of the candle container is also conceivable within the concept of the present disclosure. Additionally, variations to the disclosed embodiments can be understood and effected by the skilled person in practicing the claimed disclosure, from a study of the drawings, the disclosure, and the appended claims.