This Olsenmark Car Electric Travel Mug is made of premium stainless steel, which is healthy, solid and durable to use. The lid has good sealing and ensures that the drinks does not spill over. The mug suits most vehicle cup holders, suitable for drive travel, picnic, camping, and other outdoor activities. Powered by 12V cigarette lighter plug power source, enables one to drink hot water on the road. The cigarette lighter designed with indicator light can understand the working state of electric cup. Fits most car cup holders, great for travel use. Cup inner and outer using vacuum insulation technology, good-insulation effect to prevent burns. Sealed kettle cover made by high quality silicone gel, safe and non-toxic, good sealing performance to keep water warm, and ensures that the drink does not spill over.