It's a vintage salad spinner, from the time before they were plastic, involved cranks & stuff, and took up half your kitchen.

You load your lettuce in, go outside and swing it around in huge circles (vertical circles, please) from over your head to down by your knees.

Also works great to spin-dry hand laundry.

Note: I know this sounds like a joke, but that's REALLY WHAT IT IS!!! Honest.

Claire (who used to use one regularly, before she married someone who [A] prefers to make all the salads himself and [B] has a dryer)