About this item Modern Design: made of high-quality walnut wood and metal materials, uniform heating, safe and durable to use, and can be matched with modern offices at will. Keep Warm: Keep the temperature of , tea or other hot beverages below 80°C, without worrying about high temperature and high oxidation, and use it safely. USB Heating: easily and conveniently powered by any device with a 5V USB output port, such as your computer, desktop, laptop, tablet, mobile power supply, etc. Carrying Belt: The heater is light in weight, compact in size, easy to carry, suitable for most stainless steel cups, baby bottles, ceramic cups, glass cups, etc. Widely Used: very suitable for home and office use, making you brew warm in cold weather.