cotton bags
dessicant
Roll your own. Buy once, and let us know when you've run out.
Doing it this way is roughly 3x the cost for 100 bags as opposed to buying the ones I posted, any benefits that good to justify the extra expense from doing your own?
I know the bags would be bigger but a 4" x 6" bag isn't needed for an ammo can unless you've got a 20mm lol.
m14brian