Abstract: A single corrugated cardboard blank which when folded forms a hollow elongated prism. The carrying case includes side panels connected at side fold lines to opposing sides of a central panel, and upper and lower panels are connected by fold lines to opposing ends of the central panel and the side panels. The upper and lower panels form a substantially flat base when the blank is in the folded position. A side flap is further connected by a side fold line to one of the side panels. The side flap includes projecting tabs which communicate with slits in the central panel when the blank is folded. Also, the side flap is substantially a same shape as the side panels and the central panel, but may also be slightly wider than the side panels.