Welcome to the store! Ideal Mug Warmer: Perfect for coffee, tea, hot chocolate, and any other beverage you want to keep warm at home, in the office, or during outdoor activities. It keeps your cup of warm drink ready whenever you need it. Insulation: Keeps your coffee, tea, or other hot drinks at 45 degrees Celsius. No need to worry about high temperatures or oxidation. Safe to use. Durable Material: Made with a steel shell and aluminum plate, ensuring a long lifespan and resistance to drops. Safe and efficient. It also features a waterproof surface, so you don't have to worry about spills. Easy to Use: Suitable for powering with any 5V USB output device, such as computers, desktops, laptops, tablets, mobile power supplies, etc. Convenient and quick. Easy to Clean: The surface of this USB cup warmer is very easy to clean. Simply wipe the surface with a damp cloth. Your satisfaction is our top priority. We will provide you with the best service. If you find any problems after receiving the product, such as damage or incorrect quantity, please contact us immediately and we will provide you with the best solution!