Double wall construction keeps water cold twice as long as regular sport bottles 100 free of bpa and bps lightweight easy squeeze bottle delivers the right flow to quench your thirst removable nossle for easy cleaning trutaste polypropylene with hydroguard lets you taste your water not your bottle positive lockout for leakproof transport wide mouth opening is easy to fill with ice and water and a breeze to clean also keeps warm beverages warm during cool weather rides innovative self sea