400ml Vacuum Insulated Stainless Steel Travel Mug Car Cup with charger car Boiling Mug Electric Kettle Boiling Vehicle Thermos DC12V Heating Cup Applicable to the Boiling Water Coffee Milk and Tea Travel Mug with Leak Spill Proof (black1) Capacity:400ml.10 mins heating water to boiled (The actual heating time may be influenced by environmental temperature). Double functions with double insurance can heat water and keep it warm. Made of food grade silicone rubber and high quality 304 stainless steel. Can make tea, boil eggs, heat liquid food. Suitable for drivers, business man or those who enjoy long time self-driving trip. Caution: Please open the lid before heating to release the steam pressure.