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 PendingDurable: Our Summit water bottles are coated in a durable finish.Cupholder Friendly: The 14-22oz Summit water bottles fit in most cupholders