15 year old rice and beans? You are one bad ass prepper.
yeah we vacuum seal with a oxygen eliminator inside. Then put in mylar packaging and vacuum seal again. Then it goes in a 5 gallon bucket.
All is frozen for 7 days to kill any eggs from weevils and such before the vacuum sealing.
We do this with all of our dehydrated fruits and vegetables to.
Hell if someone would build a pyramid over my place they could dig it up in a few hundred years and have a feast.