It’s a beautiful mug, not surprising from Fellow. It certainly keeps coffee hot for a few hours (maybe longer but who takes that long to drink a life-sustaining beverage?!). My only critique is that it’s a two-handed affair to get the lid off and on, not ideal for driving and sipping.
I sadly left my original carter mug when at the Cancer Center getting my treatment. Someone walked off with it. I couldn't wait to get a new one. i just love the style, feel, and most of all the functionality of the carter mug. I take it with me everywhere.
This is the best mug I have had. It keeps the coffee warm while not having a metallic taste. What turned me off to other mugs is the metallic taste which this does not have. Highly recommend.