Ever heard of a "pickle barrel large cent"? I have a "certified one! My latest Coin Week article: https://coinweek.com/in-a-pickle-the-curious-story-of-a-shrunken-1853-large-cent/ Best, Jack.
So if I want greener pickles, all I need to do it put my liberty cap cent in the jar? That's an interesting article though, thanks for sharing it. I would be interested to see just what happens to the coin along the way and how long it takes for it to get to the point of appearance you've shown. I probably wouldn't have the patience for it!