Stash the Quick Stow Flask in your running vest, belt, or even in the palm of your hand. This lightweight, collapsible flask features Camelbaks classic one-piece silicone bite valve for rapid hydration on race day and packs down easily once its empty. They designed the Quick Stow to fit easily in the front compartments of all of our running vests. Once its empty, it folds down small enough to fit in your pocket.