Review on ☕ USB Mug Warmer in Dark Wood Finish with 3 inch Diameter by Matt Ellis

Not a very good cup warmer. I sent mine back after one use. Firstly, it never got hot enough to keep my coffee warm, my coffee got cold like I hadn't used the heating pad at all. Also, the warmer is too small, it has a ledge/frame that's raised around the top surface, and if your mug is too big, it won't even touch the heated plate because instead it sits on the frame and becomes your mug it do like be a small cup size to match; but that doesn't matter anyway because it doesn't warm the cup, even if it fits. I wouldn't recommend USB heaters, stick with socket heaters as I think they can get hotter than USB. And it doesn't have an on/off switch; To turn it on and off, you need to unplug the USB port. Not good; I do not recommend this product!