I was led to believe that this mug would keep my coffee hot for hours, as I like to sip my coffee throughout the day. Maybe I just haven’t learned how to use the mug correctly, but the battery runs down quickly and shuts off frequently. I have to pick the mug up even when I’m not drinking to make sure that will keep it warm for as long as possible. Even when I keep the mug in the charging station, coffee still gets cold. While better than my older option of a typical metal travel mug, I am still hopeful that someday I will find a solution to keep a cup of coffee warm throughout my workday.