Martha's guess was closest

Mystery object = bladder press.

Sadly, no more is wine making as hilarious as Lucy running around in a bucket of grapes. Well, it might be hilarious, but for different reasons, like using a bladder press to crush the grapes and extract juice for that lovely fermented drink. We saw one during our tour of the Concannon Vineyard. We also saw their antique equipment. And we tasted many wines. And dined on the lawn. Chocolate and strawberries, bread and cheese, nectarines and wine, brownies and chocolate, chocolate and chocolate. Cherries.