I use a Trail Designs Caldera Cone which is a titanium windshield/pot stand with a shallow/wide titanium pot and an evernew titanium meths burner. The windshield focuses all the heat on the pot and it's quite fast and efficient, uses maybe 20ml of meths to boil 500ml of water. Total stove/burner/windshield weight is 155gm which is insanely light. Can carry meths for a short or overnight trip in small (basically zero weight) plastic bottle as 100-200mls is more than enough for a few days, but I have the smallest size of Primus liquid fuel bottle (350ml and 92gm empty) for longer trips - which still only weighs about the same as a gas can for a jetboil etc.
It is fiddlier, slower, riskier and doesn't work as well in the wind as a jetboil but the weight can't be beat (total system weight for a week long trip would be approx 550gm) and it doesn't produce waste e.g. a million half empty gas cans.
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