Premium Materials: The car beverage warmer is made of ABS and copper, heat-resistant, dust-proof, corrosion-resistant, safe and durable to use. High Efficiency: Quickly boil liquids in about 10 minutes. Ideal for heating water, tea, coffee, soups and more on the go. Compact Design: Small enough to fit in your pocket, these travel immersion heaters are a fantastic space saver. Easy to use: just hold the heater over the cup to soak, plug it in, unplug it when it reaches the desired temperature, wait 15 seconds, then remove it from the liquid. Wide application: The immersion water heater can be used to boil water, coffee or tea in your car. Perfect for outdoor activities, such as self-driving travel, camping, picnics, etc., especially in the cold winter.