Patent ID: 8800856

Claim:
A container having six container-constituting surfaces, first and second constituting surfaces of the six container-constituting surfaces standing facing each other across an opening of a predetermined size formed at a third container-constituting surface, wherein the container is provided with at least a first folding surface that makes a mountain fold on the first constituting surface, the first folding surface having a width extending from the mountain fold and beyond the opening, and a second folding surface that makes a mountain fold on the first folding surface to engage the second constituting surface, wherein the first constituting surface defines a pair of first vertical slits of which a respective one is located on in each of a right position and a left position on the first constituting surface, and wherein the first folding surface extends from a portion of the first constituting surface between the ones of the pair of first vertical slits, and wherein when opening the container, the second folding surface disengages the second constituting surface and the first folding surface is folded back to a position so that it becomes the same wall surface as that of the first constituting surface, and the portion of the first constituting surface between the first vertical slits is bent.