The investment angle is a really good point, I noticed either food prices have gone up quite a lot in recent years, or the package sizes have shrunk whilst the price is the same. I always have a few cans of tomatoes, and ham at home, but maybe it's not such a bad idea to stock up on a few more cans. Apparently canned veg is much fresher than many people think because they get canned immediately upon harvest whereas often we buy veg and it may sit in the store and our fridge for a few day before we get round to eat it