In the "olden days" we made the cans by soddering the cans at the points that they touched. I don't remember them ever coming apart.
Be sure that they are opened with a "church key" triangle beer opener, not the full end opened with a can opener.
Then on the bottom, we padded with several layers of denim of old jeans. The top had a couple layers of old towels. Then a custom fitted sides, top, bottom. Being off spring of depression parents, we always used left over stuff for all purposes possible. Be sure to put a finger loop at one top edge to pick them up easier.
They were the right size for kids to stand at the sink to wash up, to see onto the cupboard to make coookies, etc etc.