Vacuum Insulated: Keep your drink cold for hours with the double-walled, insulated Summit water bottle. Leak Proof Straw Lid: Our BPA-free Summit Straw Lid is leak-proof when the nozzle is in the closed position; US Patent Pending Durable: Our Summit water bottles are coated in a durable finish. Cupholder Friendly Sizes: The 32-84oz Summit water bottles do not fit in most cupholders.