To prevent a sealing body from becoming an obstacle when a content is drunk from an opening on of a container body by deforming a connecting band in a manner to keep the sealing body away from the opening of the container body after unsealing a container regarding the easily breakable/openable container of which the raw material for the container is a polyester resin, and in which the connecting band is integrally formed over the container body and the sealing body.

To the connecting band 5 which extends in the axial direction of the container, a bending-facilitated section 5a (the boundary between a spherical crystallization section of a polyester resin which is formed by the irradiation of a laser beam, and a non-spherical crystallization section) is formed at a position close to a connected section with the container body 2 of the connecting band 5. In this case, the bending-facilitated section 5a is more easily plastically deformed than other sections of the connecting band 5.