VESSEL CAPABLE OF MAINTAINING CONTRACTED STATE

摘要

PROBLEM TO BE SOLVED: To provide a structurally simple and practical vessel whose volume can be reduced when the vessel is discarded, and which is equipped with a means capable of maintaining a state in which the volume is reduced. SOLUTION: Bellows are formed on a side surface of the vessel, and a band for maintaining a contracted state of the vessel is spirally wound around a side surface of a lid part of the vessel when unused.