Nathan Sports NS4591-0190-00 drinking bottle accessory

Our patented Race Cap gives you a high flow valve so you instantly have access to your water/gel combos. This quick access to fluids means that you can keep your eyes (and focus) on the road ahead.
Whether you want to keep more to interchange them for easy cleaning or just have lots of flasks, stock up with your Race Caps!CLASSIC DESIGN Instantly access water/gel combos with the patented Race Cap that offers quick bursts of fluid so you can control how much water you SIMPLY COMPATIBLE Fits all 8oz, 10oz, 12oz and 18oz Nathan hard flasks. Whether you want to keep more to interchange them for easy cleaning or just have lots of flasks, stock up with your Race Caps!