The invention comprises a rectangular plastic sheet which may be folded about living hinges to provide a container for holding coins and the like. The sheet is made of polypropylene or other suitable plastic material which has good living hinge qualities in thin sections. The preferred embodiment consists of three V-shaped units separated by two living hinges, which units when folded form a regular hexagonally cross-sectioned cylinder. Ledging may be provided on the end of the sheet so that when folded the ledging at least partially closes the otherwise open ends of the cylinder. A locking mechanism comprising an upwardly extending lip on a side edge of the sheet which engages a hollow behind and beneath a downwardly extending lip on the other side edge is provided. By forcing contact by the coins against the container walls when the container is closed the material is tightened against the coins and the locking mechanism becomes more tightly engaged, securing against accidental opening. Because of the construction, less plastic is needed to make this container than known horseshoe-cross-sectioned coin holders.