Hydroskins Water Bottle Silicone Sleeve for Hydro Flask, Takeya, ThermoFlask, Fifty/Fifty (Volt Green, 40 ounces) The ORIGINAL silicone sleeve to PROTECT YOUR FLASK Protects your Hydro Flask from dings and dents Innovative Design 12 different colors Easy to Clean Fits 32oz and 40oz Hydro Flask bottles and other bottles/flasks with the same design