A while back I was at a surplus store and ran across a two pack deal of the Swiss Volcano Stove and thermos for 10 bucks; it is like these here
http://www.cheaperthandirt.com/WX130-1.html.The store had a Chinese UTG knock off Max Jumbo FB too, so I tried it in the side pocket. It fit, so I went ahead and got the stoves since I have a Ma Jumbo FB. Well, I have not messed with it until today since time has been sparse but with the "blizzard" we are having today and all I decided to try it out--good to go. So know I have the bottle water and the Swiss thermos with water, the packs geared for winter, and probably won't be getting out LOL. I will try to get some pics in the next few days to show what it looks like in the FB.
Hope this helps some of you guys that have the packs.