What does a coke bottle taste like?
I forgot to mention baby food, of which I have great store, bought for silly prices at a factory surplus store. I've some I've had in for years now, and there's no sign of deterioration. OK, they can be a bit bland, being low in salt, but it's healthy, and I can make up for the low protein with other stuff. They are so convenient, being just right for a snack, at my age (no more big dinners for me; I fill up very easily) and can be eaten without heating, and some are actually quite tasty!
Example: my latest purchase in this line was 4 x 100g pots of a pear flavoured milk product for just 45 cents the lot. Beat that!