HydraPak Flux 50oz Narrow Mouth Collapsible Water Bottle with High Flow Nozzle - Flexible bottles get an upgrade. The Flux is shaped like a hard bottle, compresses like a softflask, and cuts weight by 50%. Topped with a dust cover and twist-drink nozzle for grab-and-go hydration, plus a bail handle to keep hydration secure in your hand or on your pack. The Flux stands upright like a hard bottle but when you finish your drink, this bottle packs down to pocket size. Features HIGH FLOW NOZZLE - Twist to Drink Nozzle drinks like that of a traditional wide mouth bottle but with more flow and less splash. DUST COVER - Keeps dust off your drink nozzle. Quickly opens and closes the drink nozzle with one hand without any direct contact with dirty hands. FLEXIBLE BAIL HANDLE - For comfortable carrying, quick attachment and securing the rolled up bottle when empty. FITS IN PACK POCKETS - Designed to fit in pack pockets when full and to roll up when empty for space saving storage. LIGHTWEIGHT & COMPACT - 50% lighter than a hard bottle and compresses down to pocket size when empty.