The Flux by HydraPak is shaped like a hard bottle, compresses like a soft flask, and cuts weight by 50 percent. 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. Finish your drink, and this bottle packs down to pocket size. With the Flux, innovation fuels performance, flexible bottles get an upgrade.