Portable Wireless Rechargeable Baby Bottle Warmer USB Charging And Heating Bag Portable Constant Temperature Milk Warmer Universal Bottle Insulation SleeveOverview: Wireless carry, no charge for travel. Constant temperature heating at 42: effectively maintain nutritional milk, and you can drink milk while it is heated, can be used while charging. The warm bottle holder works well with plastic and glass bottles. Large battery capacity ensures more stable heat and longer lasting insulation of the milk heater. Constant temperature light: put the milk bottle into the milk warmer and turn on the power at