Okay, I pretty well know the drill on how to bleach shock and sanitize plastic water jugs or wooden barrels to transport potable water supply, as well as how quickly that water has to be used.
We have several period reproduction tinned 3 gallon milk cans that we also use for water supply, and to carry water for any distance where we need to maintain a period appearance. Much easier than sloshing buckets around.
Using bleach to sanitize these will etch the tin--bad idea on more than one level.
Other than washing these in boiling water, what else can I use that will be effective to sanitize, without etching the tin?