Nike Bottle Clear Black 20 ozNike Sports Water Bottle with Hang Tag, Clear Black 20 oz About the product: Leak proof valve 20 oz. 600 ml. capacity Asymmetrical one hand design Product description: Contents: 59% Polyethylene, 24% Thermoplastic Elastomer, 16% Polypropylene, 1 % Silicone. Leak proof valve. Water when you need it. No mess or waste. Asymmetrical one hand design. Easier to grab and hold on the sideline or in the gym. 20 oz. 600ml capacity.