For those of you knocking Ember, the whole point is that it keeps your preferred temperature for a certain amount of time. It’s not meant to keep it warm or hot for 8 hrs. If you want your coffee at 145 degrees Fahrenheit - it will stay that way for 2-3 hrs. Most people got it as a gift and some bought it for themselves. The majority of Ember users love it so that should say something.

Also, I happen to know that Ember customer service is fantastic. The coating on my cup started to fall apart and they sent me a new cup without hassle. They stand behind their product. Would I pay $200 for a mug just for tracking purposes? No, because I have my Ember in my home office, but some folks might find that useful.