I have a Nissan vacuum bottle and a Nissan thermos (1 pint & 1 Qt.) The 1 Qt version kept my coffee hot after laying in a snowbank all night. They are much better than my old Aladdin thermos. The Aladdin is guaranteed for life though. I always preheat mine with boiling water for about 10 minutes and that makes a huge difference.

Edit: I corrected the sizes. Here is a link. The reviews bear out my suspicions that these are pretty good.