Cups can get pretty gross when playing beer pong. As the ball bounces around, it can transfer any sort of dirt straight to your drink. Slip Cup is a cup that sits inside your glass so that the ...

In the past few decades, Guinness revolutionized both draft beer systems and how stouts are canned. The key? Nitrogen, and a modified ping pong ball. Amelia Schwartz is a Brooklyn-based writer and ...