Arrived quickly and very well packaged with an adapter too. It works well! I tested it with two of the same cups with the same amount of water and the one on the heating pad definitely is hotter. I only tried it with about 1/4 of the mug so don't know how it does with a full mug.
I thought that there would be a little more diameter, but because the stylish, beautiful and really keeps the temperature, if the mug still has a lid, it will be straight in general. Expect that cold water will boil, still do not)) but it's cool.
I'm in love with this. Firstly, the product is made with great quality, definitely doesn't look cheap at all. Exactly like I was expecting it to be. Secondly, I'd like to mention how VERY well protected it was. And on top of that, I was surprised that the seller added the correct adapter for my country Kuwait along with the product which was something I was not expecting so I'm grateful to the seller, very sweet of them. At first I was suspicious because there was no tracking. But make sure to contact the seller and they will send you a different website for tracking and its pretty accurate. Ive never written a review before but this one is worth it. Thank you seller! :)