I always have an issue with my coffee in the morning. Between getting my kid's breakfast and getting things together, by the time I get to my coffee it is freezing cold. This ion mug and coaster charger has changed all of that! The mug is a very sleek matte black. It looks very classy and it's very durable. It also comes with a lid so you can take it with you if you'd like. Or if you just like the feel of a travel mug. Cleaning is a breeze and it charges up so fast! Off the charger, it lasted a few hours. With the coaster, it lasts for as long as I'd like. I am so amazed how well this works! My preference with this mug is 140° and it stays at that temperature until I'm done! I can drink as fast or as slow as I'd like! Then when I'm done drinking, it turned off on its own. Incredible! I have never been so impressed with something like this! I absolutely love my mug and I highly recommend this to anyone!