The UltraFlask IT 500ml features our new IsoBound™ insulation technology that keeps water cold and won’t sweat in warm temperatures. Engineered to keep fluids at an ideal temperature 38% longer than a standard flask. After all, cold water is more refreshing.
Prevents heat transfer from the user to the hydration, making it the ideal solution for a wide range of outdoor endurance activities
Includes a bite valve cap and an adjustable drink tube cap
Four-layer design provides users with more structure, an enhanced grip, and a no-sweat, comfortable carrying experience
Ideal for adding ice and keeping your water cool 38% longer