In reply to alexrumsey:
Drinking the water after using it to heat the boil in the bags isn't recommended (or wasn't to me). We did it anyway.
My old jetboil gets two boil in the bags and enough water for one brew. I do as you describe: heat food, remove bags (enjoy), add enough water to give two brews, heat and get some tea on. That'll probably be more efficient than using non-jetboil pans and was pretty straight forward.