samc said:
Many of the pests that eat the grain, come with the grain. Let it get to the right temp & moisture level and you get bugs. You can freeze it in batches, a week at 0F will kill the eggs and you will avoid the issue. I've usually got 50-100lbs of imported flour in my freezer at any one time to kill potential egg hatching.
I know that's technically true, but I've never had issues with bugs when storing grain properly, ever, because moisture simply isn't an issue when you use perfectly airtight containers (the lids with foam gaskets that often come with buckets are not good enough).
I think most people wouldn't really have the room to freeze all their grain, and even if they did it in batches as you suggested, they'd STILL need a good longer-term storage solution (like the ones Gamma provides) to ensure the grain continues to be bug-free anyways. Since that alone has always sufficed for me, there's really no reason for me to go through the additional hassle of freezing in batches, and I can't see it being worth anyone's trouble unless bugs are somehow an issue DESPITE good storage practices with suitable containers.
If you have the capability/capacity and desire to keep everything frozen and therefore have no need at all for these kinds of containers, that's a somewhat different story.
But since you mentioned flour, I should also mention that I know someone who keeps large quantities of flour, rice, etc, in containers with these lids and has never run into a problem with bugs OR freshness. And so, given my own experiences, and knowing a number of people using either complete Vittles Vaults or just the standalone lids on food-grade buckets, without ever even hearing of a bug problem even once, It'd be impossible for me to justify the constant energy expense of storing everything frozen.