USB Chargings Heating Bottle Warm Water Milk Heater Warmer Bag Insulation CoverFeatures: OOTDTY brand new and high quality 37 55 6 step temperature selection, with temperature display function, suitable for bottles with diameter less than 7. 2cm, and can be used while chargings.(Bottle is not included.) Close to the bottle body, better thermostatic effect, suitable for more shape bottles. When the temperature reaches 42, the temperature will automatically enter the heat preservation modes, and support 24 hours of continuous heat