The BPRC Chill Insulated Bottle will keep your fluids cold (or hot) with its double-walled construction. This large bottle from Camelbak will hold 21 oz (620ml) and includes an innovated, self-sealing Jet Valve that eliminates splatters and spills. The wide-mouth opening is easy to fill with ice and water. Its large opening also makes it easy to clean! Whether you carry it with you on a run or place it in your bike's bottle cage, you're sure to stay cool and hydrated when the temperature rises.