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. Cupholder Friendly: The 14-22oz Summit water bottles fit in most cup holders. The 32-84oz Summit water bottles do not fit in most cup holders. Not intended for Hot Liquids: Pressure may build in the bottle causing leaks or spills. US Patent Pending