Camelbak Quick Stow Flask 17oz Hydration Belts & Water Bottles : The CamelBak collapsible Quick Stow(TM) Flask provides runners with ultra-lightweight handheld hydration. This bottle is the one used in the Ultra(TM) Handheld hydration system and when empty can be folded to fit in most pockets. Hand wash vessel, cap is top rack dishwasher safe. Big Bite(TM) valve self seals after each drink. Features a leakproof, on/off lever. BPA/BPS/BFA Free. The CamelBak collapsible Quick Stow(TM) Flask provides runners with ultra-lightweight handheld hydration. This bottle is the one used in the Ultra(TM) Handheld hydration system and when empty can be folded to fit in most pockets. Hand wash vessel, cap is top rack dishwasher safe. Big Bite(TM) valve self seals after each drink. Features a leakproof, on/off lever. BPA/BPS/BFA Free.