This is my poor man/lightweight enthusiast version of the Jetboil. Not very similar at all, except that it is almost as efficient, weights 160gm less and packs smaller, all inside the pot. It consists of a modified Tatonka 1L titanium pot, pot lifter,home made (very) cozy, Kovea stove and my wrap around the pot windscreen made out from three cans. The trick is to leave the gas on low output, 1/2 liter boils in six to eight minutes (20c to 5c) and you will get a boil for under 10g (1/3 oz) of gas.
On my not so extensive tests (there is only room for one Roger Caffin in Australia) I worked out that it would take the Jetboil at least eight days to catch up with the difference in weight.My typical use is 1 to 2L per day mostly 1.5L. On my scale, the Jetboil is 435gm and my system 275gm (without the gas canister). Next, if I can be bothered, I will make a hanging set up so that theoretically ( never do this, blah,blah) you will be able to cook inside some tents without having to worry too much about wetting your bag.
The canister inside the pot is the 100gm not the 250gm in the second picture
This system is meant to save gas so it works only on a low gas setting, hence the 6 to 8 minutes boil. If you turn the gas up you will likely snuff out the flame or blow up the canister. As a simple rule , if the top of the canister gets too hot to keep you hand on it, it is too hot.