Stay hydrated without the hassle with the Nathan Pinnacle 18 ounce Insulated Soft Flask. The updated ExoDraw design molds comfortably to your hand with a grip-free strap that keeps everything secure on the move. An expandable pocket stashes keys or gels, making it clutch for long runs, trail days, or hikes. The insulated flask keeps your fluids cooler for longer so every sip hits just right.