In the early to mid-1990's POGs became all the rage. The name originates from a brand of Passionfruit, Orange & Guava juice that used these cardboard bottle caps. Back in the 1920's - 1930's kids would collect the bottle caps and play a game similar to the Japanese game of menko. In 1993 Eki Cyclery produced a set of 6 POGs -- a black with gold ink design; 2 BMX designs and a Schwinn Z-Factor, Z-Force and Z-Flight design. The Z line of bikes was Schwinn's hope for a Sting Ray-like marketing foray that never did take off.