US Patent 8246497 Throwing object

A throwing object that includes a multi-sided member that includes a top and a peripheral sidewall integral with the top. The top and peripheral sidewall together form a cap-shaped member that is hollow with the peripheral sidewall having an inner surface and an outer surface. The outer surface is formed as a concave surface shaped for receiving the finger or fingers of the user with the inner surface including a reinforcing rib that is integral with the sidewall.