Hey kids, let's stack some cups! Well, not just stack 'em...Speed Stack 'em! Touted as a "new sport," the challenge is to stack cups in predetermined patterns as quickly as possible. Hours of endless fun! This set includes 12 plastic "competition cups" (with holes in the bottoms for extra speed!) and a carrying bag. This set is endorsed as "the official sport stacking equipment of the WSSA (World Sport Stacking Association)." This set features white competition cups with "Speed Stacks" logo.