Flame-less flask. Following Sussamb's thread regarding cooking stoves I mentioned the flame-less system and yep, I went out and bought the flame-less flask.
Cost a tenner with 5 x 20gm fuel pouches. For this you get a neoprene cover, a plastic outer flask a removable stainless steel inner and a clip on lid.
I have tried it out twice ( cup a soup & hot chocolate, not together though). You pop an fuel pouch into the plastic outer, pour on 40 ml of water pop in the steel liner with the goodies plus the appropriate amount of water, fasten the lid and wait a couple of minutes.
I have to say that the drink was piping hot in no time at all. the set up was much quicker than getting out and setting up any type of stove I have ever seen, and weight wise is way lighter than jetboils. As for safety well it is flame-less and the fumes are stated as being non noxious.
Completely won over by this little flask which can be used to carry water when not in use as a cooker.
Thinking about getting the full system for cooking food, the flask may be good for pot noodle type things but who wants that?
The great thing about this system is that it can be used inside your tent safely, probably even inside your bivi. It is naturally flameless so safe to use on tinder dry moors, woodland etc. Light. 5 fuel pouches = 100gm. not heavy. Cons getting the fuel pouches in the first place, though decent paint shops sell quick lime in quantities so you may be clever enough to make your own pouches at a fraction of the cost.