I for one would prefer to use the STANDARD INDUSTRY METHODS where at all possible. The "PAW Productions" videos put out by "Bob in Idaho" and "Dave in Idaho (R. Henry)" show the exact methods used by the commercial food storage industry to pack superpails.
I understand folks wanting to re-invent the wheel, but I would prefer to produce a product that is similar in quality to the stuff put out by Waltons, Honeyville, etc. over something with a much lower shelf life that is still open to contamination with bugs. And I've seen bugs in the little vacu seal bags before.
The vacu-seal bags are NOT a light barrier and there effectiveness as a TRUE oxygen barrier has yet to be established on a LONG TERM test (now I don't mean 2 years).
I mean no offense nor to sound like I'm bragging, but I've stored food since 1986, if there was a better, more reliable, cheaper, SAFER and more effective way, someone would have found it by now.
And I understand your thoughts regarding the smaller serving sizes- everyone thinks that when you open a 5 gallon mylar of rice that is HAS to be used up within a short period of time or it will just go POOOOFF! and vanish. THAT IS NOT THE CASE AT ALL.
That being said, the cornmeal you mention, WILL get bugs in it if let to lay open for a couple of months. The whole grains- which are what folks should be storing- will not go POOOOFFFF! if you open a mylar and cannot use the entire contents in six months, a year, etc. We have some superpails in our kitchen that have been opened for close to a year- no problems whatsoever.
When you open a superpail- take the lid off, cut the mylar NEAR THE TOP (always cut your mylar close to the top, this way you can RE-USE it if you so prefer), scoop out what you need. Then roll the cut piece back on to itself and put the lid on. If you KNOW your not going to get back into the bucket for a few months, roll the cut part of the mylar back on to itself and TAPE it down with duct tape. Then HAMMER the lid on tightly. The food isn't going to leave the bucket, no matter what sales are going on at Kmart! LOL
I understand that our culture preaches convenience and therefore, a lot of folks like the idea of smaller serving sizes, etc. Understand that that's all well and good if you only putting up 50 or 100 lbs. of a product, but when you get into serious quantities, it's going to COST YOU AN ARM AND LEG in packaging costs!!!
How do I "know" that food will last like this? I donated the "old" food that was used in these tests-