I went on a tour of the KTIS radio station last Spring and returned with a free promotional thermal mug. It has been on the top shelf of the cupboard ever since. But tonight I was searching for a vessel which could keep some hot chocolate warm for more than five or ten minutes, and came across said mug. Touch-down! It's been at least 20 minutes and my drink is still living up to its name. Thank you, KTIS!