USB Mug Warmer-Induction-not even 1 star.
"I bought 2 of these, one meant to be a gift. They do not work properly. I started using the first one, and I understood that the cup's bottom has to be flat, but it has to be REALLY flat which is pretty much impossible to find, without even a tiny 1/16" lip on it. I must have 50 different mugs and none were flat enough, so I searched a bunch of stores and finally found 2 different ones. And I certainly didn't need any more mugs in my house. One was ceramic, and one was metal-- copper looking, and both had flat bottoms and they were non-insulated as advised in the instructions. Even though I started each time with hot coffee, they couldn't even keep the temperature of the coffee high enough. They would still cool down. After a few different tries, the first one wouldn't even turn on anymore when placing the mug down on it. So then I opened the next one, and the same thing. . . . . did not keep the coffee warm, so I give up, and I would never give it as a gift. I would like to return them, but I need a shipping label, please."























