To enable removable storage of a butter knife, in the interior of a container, in a state of the knife not coming in contact with the interior surface of a lid or the butter, etc., the knife being capable of completely scooping up butter or the like without leaving anything.

The butter knife 3, whose tip is thinned down to match with the bottom surface of the container, is integrally manufactured with a container proper 1 and provided with a locking part 2a in an inner face of the lid 2.