Designed specifically for the BW0021C bottle, this insulated outer sleeve provides a soft and protective layer to keep your beverage at the desired temperature for longer periods. The sleeve is crafted with high-quality materials to ensure durability and reliability. Whether you're on the go or simply want to maintain the temperature of your drink, this sleeve is the perfect accessory. Its snug fit and insulation properties make it a practical addition to your bottle, allowing you to enjoy your favorite beverages at the ideal temperature wherever you are.