USB insulation coaster: cute cartoon pattern, keep your drink warm. It is fast and safe, can be insulated by USB, and the surface is easy to wipe clean. Easy to clean: The surface of this USB vacuum flask is very easy to clean. All you need to do is wipe the surface with a damp cloth, and then you are good to go. The temperature required by the USB port. All you have to do is plug it into the USB socket and it will start working. You can take it wherever you need it. It's so convenient Wide range of uses: suitable for multi-function, ceramic cups, glass cups, metal cups, etc. Suitable for beverages that require heat preservation, such as coffee, tea, and milk. Convenience: USB design, just put the tea cup or coffee cup that needs to be heated on it, and then directly charge it to Cartoon pattern, stylish and beautiful. It can be powered by any device with an output 5V USB port, such as your computer, desktop, notebook, tablet, mobile power supply, etc., simple and convenient. Delivery Quantity: 1 Pcs Product color: Yellow Notice:The colors may be a little difference for the different monitors displays, please understand.