Not every dented can in an emergency kit is a write-off, but some genuinely are, and knowing the difference matters most when medical help may not be close by. The core risk is Clostridium botulinum, which produces a colorless, odorless, tasteless toxin, making physical inspection the only reliable safety checkpoint. Minor shallow dents in the body of a can, away from seams and rims, generally don’t compromise the seal. But dents on seams, deep creases, rust, bulging, or any can that spurts liquid when opened are non-negotiable discard situations. Expiration dates and dent damage are separate concerns — a past-date can with an intact seal may still be safe, while a fresh can with seam damage is not. Proper storage on wire shelving, away from moisture and heat, reduces the frequency of damage. And regular inspection practices keep the entire supply trustworthy when needed.
source: https://www.emergency-list.com/dented-cans-in-your-emergency-kit-box-keep-or-toss/
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