I have about 10 vessels, along with two of each type of coffee. All brand Lavazza. They sit in the cup warmer on top of the coffee machine. I had one of the mid-size in my old work place and go down to the cafeteria and get me a coffee in the cup. Do not use Lavazza coffee and hid the glass behind the counter!
Drinking some tea forte out of this coffee mug I got from Mimuno. Double walled is the way to go for me, keeps everything warmer longer without getting hot on the outside.
This is my second favorite, that I keep at the office. My favorite is at home, where I have been using it exclusively for 20 years. I'll post that one later.