Reduce. Reuse. Repair… The Maintenance Kits are designed to do just that. Our kits include o-rings, gaskets and gaskets tools -- a no-fuss fix that extends the life of your bottle so it's running as long as you are. Kit includes two replacement o-rings for Classic caps.
• Works for all Classic caps: Loop Cap, Stainless Loop Cap, Bamboo Cap, Sippy Cap, Sport Cap
• Classic Opening Diameter: 1.75'' (44mm)