Source Outdoor WXP SQC QMT Helix Valve-IRR Cover (Coyote, 3-Litres) High performance 2L hydration reservoir system combing clear and wide pack systems Maintenance free glass-like liner with integrated Grunge Guard antimicrobial treatment and exclusive 2 layer coextrudated polyethylene construction. Taste free! Patented leak-proof lid with wide opening for easy cleaning, draining and ice insertion. Covered tube with dual quick disconnect valve. Exclusive Helix bite valve delivers high flow with minimal bite pressure