This innovative, high-flow valve self-seals to eliminate spill and spatter even on your bumpiest rides. It's spill-proof when open and pushes closed for a leakproof transport. Provides a sip or blast of water and features a removable nozzle for easy cleaning.  Fits all newer model 12oz, 20oz, 24oz Polar Bottle brand water bottles. Please verify cap compatibility before purchase. Does not fit legacy Polar Bottles made prior to 2006.