Hey sport stackers, listen up! If you've ever experienced those frustrating fumbles during fast stacking, this Cup Keeper might just be your new best friend. Here's the thing - even cups that are just slightly out of round can cause major issues when you're stacking quickly. They create friction between cups and don't separate like they should, leading to those annoying fumbles that happen so fast you don't even know what went wrong. Speed Stacks cups are designed with specific clearance between each cup so they separate freely, but when they're out of round, that clearance disappears and even a light grip can make cups stick together. This Cup Keeper solves all that by maintaining your cups' perfect round shape. It's specifically designed to keep your Speed Stacks cups in competition-ready condition, ensuring they perform exactly as intended every time you stack. Whether you're practicing at home or competing in tournaments, having cups that maintain their proper shape makes a huge difference in your performance and consistency. No more blaming mysterious fumbles on bad luck - with the Cup Keeper, you know your equipment is always in top shape!