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 it&&';;s empty. Camelbak designed the Quick Stow to fit easily in the front compartments of all of our running vests. Once it&&';;s empty, it folds down small enough to fit in your pocket. Bite valve self-seals after each drink, eliminating annoying drips Empty flask collapses and folds ultra-compact to fit in most pockets Cap is top-rack dishwasher safe Volume indicators in ounces and milliliters for tracking hydration and adding electrolytes Hang flask upside down for easy drainage and drying