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 its empty. We 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. Features: Big Bite Valve - easy bite and sip valve self-seals after each drink Leak proof - on/off lever. Water when you want it, none when you don't Large mouth opening - allows you to fill the flask easily with ice and makes it easier to clean Hydroguard - antimicrobial Technology Inhibits The Growth Of Bacteria In The Flask BPA, BPS and BFA free Easy dry hanger loop - hang flask upside down from loop for easy drainage and drying Ultra-compact - empty flask collapses and folds to fit In most pockets Dishwasher safe (cap only), hand Wash vessel