A lot of people in USSR used to place silver spoons into containers with water. The exact benefit/mechanism was generally not defined other than "avoid contamination", but was frequently implied to be antibacterial.
I don't have any references at the moment (can google if community requests) but it was an extremely common practice (every family I knew who owned a silver spoon did that, which was probably 80%+ people) so I'd consider the notion to be notable enough even without web links.
So the question is, are there any studies supporting or refuting ANY health benefit (probably antibacterial but not restricted to that) from placing a silver object into water container where water for drinking is stored for a long period (say, 6 to 144 hours).
Due to a somewhat vague nature of the claim, I'm specifying the following restriction: The claim being investigated must somehow be a plausible scenario that a random family would expect to affect the water being stored. E.g. antibacterial/antiviral are in-scope. Decreasing radioactive exposure isn't.