Double-walled vacuum-sealed construction keeps your water cool for hours and prevents condensation from forming on the outside of the bottle. Naturally 100% BPA-Free, taste-free stainless steel doesn't require inner liners or plastic coatings like those used in aluminum bottles. Redesigned cap for greater durability and faster flow from our patented flip-top bite valve that lets you sip without tipping or spilling. Integrated loop handle for carrying convenience. Dishwasher safe. Hydration Capacity: 16 oz / .5 L.