Good question, and I don't know. But, if you take a look at things at the grocery shelves, then I would start wtih that. If you think about it, there are thousands of things that can be sealed. Before I started prepping, I didn't know you could can meat like some do.
Like I said, you can vac seal things and they last a long time, sometimes even at room temperature. Coating your eggs in mineral oil or something like it will make them keep for nine months in a cool dry place. You can make brownies and seal them up for a long time, any sort of crackers, grains, spices, jerky, MEDICINE is another one, sometimes it's hard to get bigger items to seal right but in all vac sealers are way underrated.