Review on ☕ USB Metal Constant Temperature Heating Coaster - Insulated Mug Warmer, Creative Heating Coaster for Coffee Mugs - Desk Coffee Mug Warmer (Black) by Seth Hogate

Unfortunately, there doesn't seem to be such a thing as a USB mug warmer that will keep hot drinks at the right temperature like warmers that slip into a wall-mounted vessel. I think it's not enough power. I don't quite understand why, maybe they're trying to use the same mechanisms inside and haven't bothered to change the technology for that? They are all the same; brand doesn't matter. All USBs come from one place. Someone just has to make it clear to China that the technology between USB and socket should be different when it comes to a warming product.