In my experience the Yeti can keep coffee hot for up to 6 hours which is pretty good.
After 6 hours the coffee in the Yeti will begin to get lukewarm and then by 10 hours or so the coffee gets cold.
But I usually drink my coffee within a few hours but sometimes I will have coffee in the Yeti for 6 hours and it's still pretty hot after that time.
I would recommend the Yeti Coffee mug to anyone looking to keep coffee hot for a good long time as long as you have the Yeti Coffee mug in a warm room and not in a really cold environment.
If the coffee is in the Yeti and it's in a cold environment then the coffee will usually only stay hot for a couple hours.
But if you have the Yeti Coffee Mug in a warm enough room or in your warm car then the coffee will keep up to 6 hours and stay hot for that amount of time in the Yeti Coffee Mug.