Beeramid Pong Cup Stacking Coasters allow you securely build multi-level cup structures and play 3D Beer pong with any standard party cups. 
3D Beer Pong is played exactly the same as traditional beer pong except you have to work form the top down. Each coaster secures the cups beneath and above while blocking a ping pong ball from entering the cups below it with its perimeter flange. Once you've made the last cup at each level, you clear the coaster(s) and unlock a new level of open cups to aim at. 
 
This set includes 8 coasters so you can play 10 cup v 10 cup 3 level beeramid pong. Although the "Beeramid" structure is the most popular build, these stacking coasters allow you to build other shapes and scale up to almost any size. Beeramid Pong Coasters are reusalble and stack together neatly for easy storage.