Bottle conforms to your hand, and shrinks as you drink with a high-flow bite valve and large 42mm opening for easy filling and mixing.

• Insulated design keeps fluids cool 30% longer, and provides cushioned comfort and sweat-free hands
• HydraPak® UltraFlask™
• BPA/PVC-free & easy-to-clean ultra-flask/bite valve
• Available in 3 sizes: 10 oz., 16 oz. & 20 oz.