HydraPak - Collapsible Backpacking Water Bottle

LIGHTWEIGHT & COMPRESSIBLE 50% lighter than a hard bottle and compresses down to pocket size when empty. HIGH FLOW NOZZLE High flow drink nozzle includes protective dust cover and can be quickly opened and closed with one hand. FILTER COMPATIBLE Compatible with 42mm threaded backcountry water filters including the HydraPak 42mm Filter Cap. FITS IN PACK POCKETS Designed to fit in pack pockets when full and to roll up when empty for space saving storage. ULTRA DURABLE Made of dual-layer ?lm laminate construction, with abrasion resistant TPU & RF welded seams for superior durability and elasticity