scupper stoppers

I saw boat drain plugs at Wal Mart for $1.25. Can I use these in place of scupper stoppers?

If they fit, you should be able to.

Wal Mart also sells dense foam type practice golf balls.

A pack of about a dozen is around $2 to $4. Just push them in the hole and they expand to fit. No leaks.

Dollar Trees sell softer foam balls that work also. A pack of 4 or 5 is $1.