One thing I tried and it worked, was to use one of those can openers that does not cut the metal (safety can opener/side opening can opener), but separates the seam. Once washed the lid fits nicely back on the can and it works with most cans. I have used smoked oyster tins for PSKs. I use tape, which I know you did not want to do, so you might be able to solder the lid back or if tape is a possibility consider that self-sealing silicone tape to make it water resistant.
Safet Can Opener Safety Can Opener Safety Can Opener Pete
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