For shorter trips (1-2 days), I'll run a MSR Pocket Rocket 2 with titanium cookware. I get the 3.9oz cannisters that fit inside the pot along with the Pocket Rocket. I usually get about 2 days of 3 mountain house meals per day from a 3.9oz cannister at 1-3k elevation. I've never run out of gas or tried to test it though, I always just bring a new one on trips. If I am going higher than that I bring the bigger fuel containers so I don't have to worry about it. I also have a Jetboil flash which I really like, but it takes up more space than my Pocket Rocket setup. I'll use it for backpacking trips when I take my bigger pack.