It all started with the collapse of a pantry shelf and we realized that some of our cans were not of this century.
Food rotation that's the answer, I think I saw something at the bulk food warehouse, "must research on the web." This led to the discovery of freeze dried food, lightweight and long-life--a great tool for emergencies. I got the idea of having a few days supplies in a pack for emergencies; "must research MREs on the web."