What was the most meaningful object on Friends?

The most meaningful object on Friends was undeniably the famous lobster plush toy that appeared in multiple episodes throughout the series. The plush toy was first given to Rachel by Phoebe when Rachel was feeling upset about Ross moving on with Julie. Phoebe explains to Rachel that lobsters mate for life, and that she and Ross are meant to be together, just like lobsters. Since then, the lobster became a symbol of Rachel and Ross's relationship.

The lobster made several appearances throughout the show, including in the famous episode 'The One with the Prom Video', where Ross surprises Rachel by revealing that he had been planning to take her to prom before she found out about Monica and Chandler. In the final episode of the series, Rachel uses the lobster as a way to express her love to Ross before boarding her plane to Paris.

The lobster plush toy became an iconic symbol of the show and the relationship between Ross and Rachel. It has since become a popular item for fans to purchase and display as a keepsake from the show.