Source Military WXP Olive Bladder 3L TASTE-FREE System - Glass-Like Liner technology in reservoir and tube delivers pure liquid taste with no plastic flavor. BACTERIA- FREE System - Grunge-Guard Antimicrobial technology blocks bacterial growth for the life of the system CARE-FREE System - Glass-Like Liner with Grunge-Guard antimicrobial technologies eliminates the need for cleaning. For days, weeks and even months of use simply refill and drink again and again with no special care required FDA approved materials All materials in contact with the drinking water are FDA approved. Guaranteed safe and taste-free drinking water 1 Hi-Flow Storm-Valve - No-bite push-pull valve with integrated shut-off mechanism. Like drinking with a straw. Easy disassembly for cleaning. (U.S. Patent 6,622,988). 2 Angled Valve Turned 360 degrees for perfect valve/mouth orientation. Allows tube to be 25cm shorter. Less excess tube bouncing around the chest! 3 Dirt-Shield Protective Cover No more dragging in the dirt! Keeps valve free of dirt and protected. 4 Cool Weave Cover Tube Insulates and blocks UV-light. Water stays cool and bacteria free from first to last sip. 5 SQC Quick Connect Hose Fitting- Quick connect hose fitting offers push button convenience, SQC has a built in shut off mechanism which allows the tube to be disconnected without spilling, and is compatible with most filtration systems. 6 Widepac Wide Opening Access Patent pending slide closure for easy draining and cleaning. Airtight seal. 7 Large NC Filler Cap with Integral Refill Handle- Air tight, low profile, one hand operated. Compatible with commonly used personal filtration systems.