Double wall construction keeps water cold twice as long as regular sport bottles positive lockout for leakproof transport innovative self sealing jet valve eliminates splatters and spills also keeps warm beverages warm during cool weather rides lightweight easy squeeze bottle delivers the right flow to quench your thirst hydration capacity 600 ml 100 bpa free trutaste polypropylene with hydroguard lets you taste your water not your bottle wide mouth opening is easy to fill with ice and