Oh yeah, and not just 'maters. When my ex father-in-law died, I got the fun job of getting rid of all the stuff he had wasted money on over the years. He would buy a case of anything when it was on sale. Not as a "survival" thing, just 'cuz it was on sale. He would store those cases in his garage, which got down to freezing in the winter, and into triple digits in the summer, then forget about it. I found case after case of canned veggies and fruits with that dreaded black ring, many with the sides and tops starting to push out. I won't even tell about the cases of TP and paper towels with the mice living in them...