Retort bags are interesting..Not sure they fit into my frugal kind of style though. We eat what I can so that things don't sit on the shelf a long time. I rotate. Love having meals ready to eat. I only can meals like meat, potatoes and beans. Things that take a while to cook, you can use them in many ways, things that are the backbone to a meal. Green beans, peas, tomatoes, I don't can.
The bags aren't expensive, but they are one use. They may fit in at one point, but I have so many jars I've picked up at estate sales for almost nothing, i'll never fill them all.
The fella who's funeral we went to was a major prepper. He was prepper when prepping wasn't cool. One of the smartest things he had was 2 simple motorcycles he kept hidden ready to go. His thought, a way to get out of the city if traffic is all stopped. He also had astronaut food. Had a whole room of it. Not quite sure, but they were in foil packs. COuld be something totally different than what we have today. But, bugs ate through them eventually. They were suppose to last forever. Again, they may have been something different, but they were a foil metal material....