Boat motor cooler.
Almost 20 years earlier, I was given this (took it from a roll-off) by a friend who was cleaning out their barn. This is the engine cover from a 1960’s Johnson outboard boat motor - and I was going to make it into a cooler! My friends laughed.
Fast forward 20 years, here it is. I then gifted it back to my friend!
(now I have to make one for myself).