I’ve gotten my mylar online at amazon IIRC and oxygen absorbers too....but I don’t use my mylar much....I use canning jars or large pickle jars.
Same here. Amazon.
I bought the heavier bags to fit a 6 gallon bucket. I seal them with a 2 ft aluminum level across the top of the bucket with an iron.
By leaving the lid off the bucket overnight I can see the vacuum seal as the oxygen is used up.
I do buckets in batches of 10 to use an entire pack of 10 O2 absorbers.
This way the mylar bags are resealable several times and still fill a 5 or 6 gallon bucket.
Anyone experiment with making O2 absorbers. The bags and absorbers are all made in china.
I ate tested some 40 year old rice stored in a common food grade 5 gallon bucket.
It at just fine.