I did a quick search on the forum and didn't see any mention of "Thermal Cooking" or cookers... sooooo.... I wanted to share the "Saratoga Jacks" Thermal Cooker.
We have the 7 liter kit with all the timings and extras. We use it on every trip and about once a week at home to make soup.
Basically the idea is you bring your crock-pot-recipe up to a boil for a few minutes then place in the thermal outer pot and close the lid. Typically anytime from ~3 to 5 hours later and your meal is ready to go. While we are camping we will place a crock-pot style meal in the pot before we head down to the river mid-morning. And when we arrive back at camp in the afternoon our main meal is ready to eat.