Recently I came across pour and store bags. They seem a bit similar to the bags for trekking freeze-dried meals like Travel lunch. That gave me the idea of preparing the meals myself beforehand and packing them into such bags. It sounds easy & clean on the hike: just take out the bag for one meal, pour hot water into it and wait a while. The bags could be reused, which is a plus.
Is something like this a common practice? Which kind of bags would be good for it? (I mean, it has to be 101% food safe and withstand the hot water.) I do realize there’s only so much variety of such meals that I can prepare at home without freeze drying, but I don’t mind. I’m mainly curious if the system works and what bags to use.