The USB Cup Warmer is an extremely simple concept that can be extremely useful. You make a cup of tea, sit down at your PC, become thoroughly involved in something and before you know it your drinks are stone cold. However, with this little device being plugged into your USB port, it will keep your cuppa warm whilst you work.
The device measures in at 12cm squared, so it’s about the size of a normal coaster and therefore is not going to take up too much space on most desks. It plugs directly into your PC or Mac but unlike some USB devices, this one can be turned off when not in use rather than having to unplug it.