I also use chlorine buckets because we can get a ton of them free for the asking by calling up pool cleaning companies. I store basic stuff in there and/or food in mylar. Those are very heavy duty buckets with screw down lids.
Someone asked about old cake mixes. We have those regularly and usually simply adding an extra egg is all that is needed. I did find that when it's three years or more out of date, it wouldn't rise though.
I have been putting rice and also beans in food saver bags that are about 2-3 cups per and vacuum sealing them...this way, I can just either put them back in the big sack they came in or stack them in a bucket. I figure I don't have to worry about opening a sealed bucket and having the rest get stale or buggy before I have used a 5 gallon buckets worth. I am actually considering opening some of my buckets of corn meal and wheat and switching to the individual vacuum sealed bags.Canned cooked beans from 1998 are fine too. They tend to absorb a lot of the water in the can but are just fine even though some brands get a metalic taste.
Buckets of rice and beans are great also. If the beans dry out too much then they are firmer and work better in a pressure cooker. If they are still too hard afer cooking I go after them with a mixer and make them into refried beans.
