heidi just did a post over at vansteaders on thermos cooking. i haven't done it in some time, and with the cold weather approaching, will welcome hot food with little effort or fuel consumption. one of my biggest complaints was poor results in cooking brown rice. heidi's blog shows success with that, here
you can read my old blog post on making a reflectix cover for my thermos here.
thermos dimensions: 4" diameter and 7"tall
circumference of thermos alone 12.5"
circumference with cozy 17.25"
20 oz. (0.59 liters)
some photos of my thermos: