Mud Cap Protection: Nozzle cover keeps dirt and debris out for clean hydration on dusty trails Optimized Cage Fit: Securely fits most bike bottle cages for easy access during rough rides Effortless Hydration: Easy to squeeze design with high flow self sealing cap for fast, spill free sips Durable and Safe: Made from BPA free materials for long lasting, clean hydration Durable and Safe: Made from BPA free materials for long lasting, clean hydration