TimR wrote:


I'd use a hot glue gun. Put a quick dab of glue on the shelf, stick
the can down, done. Secure, but easily removable.


Gorilla Glue also seems to be removable. It sets up in a couple of hours.

Long ago, I spent a dollar or two on a screwdriver magnetizer at Radio
Shack. That way I can magnetize my favorite screwdrivers when needed.