Snow Peak Ti Gigapower, 1.75 oz with home made wind screen, identical to Snow Peak's steel one, but made of Ti, 1 oz. Coleman Peak One canister lasts me 5 days, compared to others, like Primus, which last me only 3 days.
If below freezing weather is expected, use MSR Isobutane canister.
Both fit into REI Ti Pasta Pot (1 qt), a little over 4 oz, with room for the windscreen also.
Like to heat up at least a quart of water to use for tea, as well as the meal, which in my food system, needs to be simmered, another reason for the canister.
Hope this is clear, and helpful.