I just received my Ion Mug with charging coaster.  It was  cold, so it was time for hot cocoa. It just took a few minutes to get my drink to my  desired temperature.  Didn't have to use any pot or microwave just my mug. I love it.  Nice looking mug with my favorite hot drink within a few minutes.  But I took longer to finish, thinking it was going to stay hot longer,  it didn't.  Will have to try it again taking notes of the time to see if I was too slow to drink it.