If you missed the first cereal taste test (one winner, one loser) it is the post just preceding this one. Out of these cereal options above (one with a 2021 best by date and the other two with 2022 best by dates) they were... ALL WINNERS.
Yes, they were all fresh and tasted great with good textures.
So it was time to longer-term store them. I do this with mylar and an oxygen absorber.
Food quality mylar bags
An oxygen absorber
An oxygen absorber
An old hair straightener to seal the bags
Since it would be rare for us to want cereal for breakfast, I sealed them all back up (I kept one from yesterday in the cupboard though for all of us to use this week/next week) and they are all back into the 2-3 year storage pantry. Breakfast cereal or tasty dry snack... I'm good to go.