I got my partner one of the ember mug 2 for Christmas because he is a web designer and works from home and he was always running to heat up his coffee. Now with his mug he has the perfect temp all day. After I seen how much he liked his I got a ember travel mug 2 cause I work in a dental office and drink coffee all day. I bought a second charging coaster so I do not have to take one back and forth. The only complaint I have on this cup is the battery life. It only lasts 2 hours if I’m lucky. So I basically have to keep it on the coaster all of the time. Hope you guys come up with a longer lasting battery soon!