Stash it in your running vest belt or even in the palm of your hand this lightweight collapsible flask features our classic one piece silicone bite valve for rapid hydration on race day and packs down easily once itrsquos empty we designed the quick stow to fit easily in the front compartments of all of our running vests once itrsquos empty it folds down small enough to fit in your pocket the quick stow conveniently holds 500 ml 17 oz of water bite valve self seals after each drink elimina