Freezer bags won’t last 20 yrs, they won’t last but about 6 months. Its also not necessary to store rice and beans in the freezer.
Use Mylar bags, something for bugs, and an O2 absorber. Use an iron to seal the mylar bag and they are good to go.
Thanks. We used mylar at the ad agency as overlays back in the 80s.
Is that the same stuff?