Some of the world's fastest cup stackers are right here in Philadelphia. What's cup stacking? It's a growing sport, as school officials found out this week. KYW's Mike DeNardo says don't blink. If you ...

FAIRFIELD, Ohio -- To most people, a plastic cup is just a vessel from which to drink, but for Robert Weatherington, plastic cups mean competition. The 17-year-old from Fairfield is part of the U.S.

Editor’s note: This segment was rebroadcast on Sept. 30, 2025. Click here for that audio. In the early 2000s, thousands of U.S. schools had their students race the clock to stack cups in gym class.

Can you imagine spending an afternoon stacking and unstacking a bunch of plastic cups? If that doesn't sound like fun, then you probably haven't tried sport stacking. This emerging sport may sound ...