[Retlaw]

Originally Posted by MargaretR

It is the underside of 'a thing-o-purpose'
I can see some wear on the protruding bits and a drainage hole.

Spot on with the thing-o-purpose, but what purpose was that. You could have called it a doofer and been just as near.

No wear on it, it was never used, and that is no drainage hole, you will get an eye opener when you find out what the hole was for.
Retlaw.