Sue the "stovie's" name for it is Drum Heater.like you said it's just a coffee can shaped,but made from steel, drum that was made to fit over the old Coleman 503 stove that i have in one of the first photos.i have never seen it as an accessory on any other Coleman,or other stove.as a heat sink it throws out a lot of heat and you don't have a open flame to worry about,just melting your poly wind pants if you brush into it.

I wonder how well an MSR Reactor would work in this situation.

It would still have that CO problem in an enclosed space.

cookies are wonderful..i did a search for car heaters on Google and now i'm getting pop-up adds from JC Whitney while i'm looking at survival stuff on Youtube..