The woman bought it 20 years ago and had plans to turn it into a planter
There are some people true to their word, she said she had about 50 emails for it and mine was the first so I got it.
Since she honored her word to you I think it only fair that you honor her intent with the cooler.
All you have to do is take the drain cap off and it should drain nicely. I'll vote for petunias.