I used a Jetboil Sol with 1.8 liter Sumo mug this summer. 13.5 days, two people, 4 cups of coffee in the AM, and 2 1/2 - 3 cups of hot water for dinner, sometimes double that for double food. We used most of one 110g Jetboil cartridge for the first 5 days, and little more than half of a 220g canister for the remaining 8 days. We even made hot water for dishes to use up the excess fuel. That stove is amazingly efficient. For anything longer than a few days, this has to be one of the most weight efficient setups.
And it's safer to use than this contraption
seen on Muir Pass
