24 Bottles Thermal Water Bottle Cover 1000ML - BlackThermal Cover protects your Urban Bottle from damage while enhancing its thermal capacity, keeping liquids hot for up to 3 hours and cold for up to 4 hours. This simple neoprene shell is a unique accessory that turns your Urban Bottle into a thermos without affecting its lightness. FEATURES Neoprene Suitable only for Urban Bottles SPECIFICATIONS THERMAL COVER 250 ml: Weight 21 g THERMAL COVER 500 ml: Weight 33 g THERMAL COVER 1000 ml: Weight 36 g