Source Tactical WXP 3-Liter Hydration Reservoir Leakproof Antimicrobial System with Storm Valve Patented leakproof wide slide opening for easy cleaning, draining, ice insertion Tube Cover Insulates and blocks UV-light. Water stays cool and bacteria free from first to last sip QMT Source Quick Mate Technology hose fitting offers push button convenience, no leakage, offers click-in compatibility with USMC Miox filter system Patented push/pull Storm Valve requires no biting, delivers 25% higher flow than bite designs. Integrated valve shut-off Covered tube with dual quick disconnect valve