I have both the Travel Mug and the Regular Mug.  I take the Travel Mug (3 hr battery) when I work and use the Regular Mug (1 1/2 hr battery) everyday.  Allows me to have at least 2 leisurely cups in the AM. Been waiting a long time for something that didn't have to be plugged into an outlet or car cigarette lighter. I like my coffee hot and these do the trick.   Customer Service is also great.