I have used the predecessor of the Kelly Kettle, the NZ made Thermette.
We used that for picnics.(hot water for coffee/tea and washing up)
Not for backpacking but could work for basecamping.
Now I have the backpacking friendly Boilerworks Boiler, mine is 10 oz.
http://www.theboilerwerks.com/about/
I used the Caldera Cone most times ,occasionally canister stoves (in winter) but the BB could work for me if staying in an area with plenty of wood and of course where it is legal to burn wood.