HydraPak STOW™ 500MLDescription Sized right for short trips and their smaller packs and pockets or as the base of a squeeze filter, the Stow holds its water, then, when empty, rolls up to stash in places other bottles wont fit. Its durable, flexible, has a flip top cap cover to protect the high flow and spill proof nozzle, and an integrated bail handle that makes clipping and carrying easy. And, at a weight thats 50% lighter than most hard bottles, carrying gets even