About this item 【USB Thermal Mug】 It is powered by any device with a 5V output USB port, such as your computer, desktop, computer portable, tablet, power bank, etc., easy and convenient. 【Wide scope of application】Lightweight, small in size, easy to carry, suitable for most stainless steel cups, baby bottles, ceramic cups, glass cups, glassware, etc., to evenly heat coffee, drinks, milk and tea. 【Warming plate】Keep coffee, tea or other hot drinks at 80 degrees Celsius, without worrying about high temperatures and high oxidation, it is safe to use and makes your cup full. 【High quality material】Made from wood Made of high-quality walnut and metal materials, it is evenly heated and safe and durable to use. 【Warm Tips】Perfect for home and office use. water, keeping you warm in cold weather. It is only used to keep tea or coffee warm, not to heat it.