While watching preppers on youtube I have picked up some tips. If you have a food saver, you can order jar sealers for canning jars and canisters that go with the machine. If you put candy, flour or whatever in a jar, you put the flat lid on and seal it. It is magic and it is vacuumed for good until you open it.
Now in the canisters, you can seal jelly jars, spaghetti sauce jars or most any glass jars. Just put one in the canister and seal it up. I have been drying vegetables and fruits and I am sealing them in jars.