With an ergonomic asymmetrical design, the Nike Sport water bottle boasts a leakproof valve to ensure water when you need it with no mess or waste Essential for any training and in a variety of colours to suit any preference Pack Includes 12 Bottles – All one colour Leakproof valve Asymmetrical one-hand design 20oz (600ml) capacity 50% Polyethylene, 24% Thermoplastic Elastomer, 16% Polypropylene, 1% Silicone