Mylar bags and oxygen absorbers is the 21 century way of storing food for long time cheaply and very easy to use. I think for storing foods it almost makes vacuum packing obsolete. Unfortunately I had to find that out the hard way after I purchased a vacuum sealer.Both, along with mylar bags can be found on ebay also.
You can eat rust too it's not toxic. Old doctors used to say boil three iron nails in a pot of water and leave it for a day and then drink it to cure anemia. Come to think of it many iron vitamin brands use it too. Powdered iron oxide.that kinda scary to think i have rice with a bag of rust .