USE INSTRUCTIONS: You can use it for cold use after putting the BOTTLE COOLER into the freezer for 2 hours or more. FUNCTIONS: This bottle-cooler maintains the temperature of a bottle much lower than the outside environment three times longer than a bottle without a bottle-cooler. A fun way to keep your beverages cold. Fits different-size bottles and longnecks... Great for outdoor events. CHARACTERISTICS: Features in large printing area make your logo noticed easily. Nontoxic, portable, reusable, safe and easy to use. Fridge safe This can be made in any shape, filled in any indicated color and filling materials, printed with any permissible logo. MATERIALS: NYLON TAFFETA OEM orders are warmly welcome!