Patented AUTOSEAL technology - Press the AUTOSEAL button to sip; release to automatically seal. No cap to remove, no spout to open - convenient one-handed water bottle operation from sip to seal, perfect for all activities. Patented AUTOSEAL lid is 100% leak-proof and 100% spill-proof. Water bottle features a built-in compartment - just flip open door to store ID, gym card, money, key, and more! Flip up handle with carabiner to clip to gym bags and backpacks.