My son wanted to start using our Keurig to make coffee to fill his thermos for work. He was frustrated by the fact that he needed to brew two cups individually to generate enough coffee. Since the Keurig came with the standard (non-thermal) carafe, I suggested trying that. I bought some carafe-sized pods and he gave it a try. He was pleased, but he didn't need all of the coffee brewed in the thermos.
So I decided to get this thermal carafe, with the idea that he could brew a carafe when he got up, and then I'd finish it off when I got up, about three hours later.
It works fairly well, but by the time I get around to pouring mine, it's cooled off somewhat. It's still warm and drinkable, but not hot. I sometimes stick it in the microwave for about 20 seconds to heat it up. In general, it's providing a solution for us without wasting coffee (and somewhat justifying the pricey carafe pods), but it would be nice if it kept the coffee hot just a bit longer.