Patent ID: 7108151

Claim:
A container capable of keeping a lengthwise contracted state in which a container body comprises: a top tap; a small width in a height direction at a bottom; and a horizontal bellows formed on the whole or part in a longitudinal direction of the container body, except the top tap, and the width in the height direction, wherein when the bellows of said container is pressed longitudinally from both sides thereof toward a center, said bellows is collapsed to overlap, a connection between the top tap and the container body is bent to place the top tap in the overlapping bellows, the width in the height direction at the bottom of the container body is placed in the overlapping bellows, and this state is kept, the bellows includes (1) an upper group of folds increasing gradually in diameter connecting with each other, each upper-group fold having an upper side thereof connected with a lower side thereof with an outside periphery therebetween, and (2) a lower group of folds maintaining an identical diameter and connecting with each other, each lower-group fold having an upper side thereof connected with a lower side thereof with an outside periphery therebetween, first lower-group fold having an upper side thereof connected with a lower side of a last upper-group fold, the identical diameter of the lower-group folds being longer than the diameters of the upper-group folds, and said folds are so formed that forces along the longitudinal direction applied to the top tap and the bottom reach a balance such that outside peripheries of the upper-group folds are raised upward and the outside peripheries of the lower-group folds are collapsed downward.