Electric Lunch Boxes Eco-Friendly Hot Case Lunch Box Food Container Plastic Modern Detachable Environment-Friendly The electric lunch box is made of food-grade PP material and a plastic-separated liner. Can come into direct contact with food. The bottom of the heater is designed with an aluminum plate, which circulates heating and is heated evenly. The food-insulated lunch box container has strong heat resistance, no peculiar smell, and is durable.It can be heated to the ideal temperature in 30 to 40 minutes while always maintaining a steady temperature to keep your food moist and fresh thanks to constant temperature PTC heating and low heat consumption cycle. Our lunch box lid includes a built-in rubber seal and buckles on all sides for improved sealing, so you don't have to worry about liquid food spilling inside. The environment of a car shaking. The heated lunch box comes with 1 power adapter: a 110V/220V household socket. For heating food in the office/home, this cannot be used in the car.