Keep your fluids cool in the Amphipod Hydraform Soft Tech Insulated Handheld 16oz! This soft-flask insulated handheld combines a comfortable form-fitting strap and an expandable pocket for storage. The soft-tech™ shrink-as-you-drink bite-valve offers easy sipping while you're on the move. Thumb-Lock™ design and adjustable sling helps eliminate hand cramping tension Large expandable zip pocket (size varies by model) offers space for keys, cards and more with two quick-access gel slots on the strap Insulated design keeps fluids cool longer while providing cushioned comfort and sweat-free hands Reversible flask for easy cleaning and drying, top-rack dishwasher safe and BPA/PVC free.