Thanks for all the suggestions!
I don't seem to have a problem with them in the sugar, we go through it too fast. But the flour is the problem, and jiffy corn bread mix, etc.
I have put them all in the freezer. Will zip lock bags work for the storage containers when out? How long can you store them in the freezer without problems? (Our local store had them on sale this week and I stocked up)
For those that use a bay leaf, how does that work? You just put a bay leaf in the container?