From Stardew Valley Wiki
??Pinky Lemon?? is a secret piece of furniture obtained by placing Duck Mayonnaise in the partially hidden purple box in the back room of The Stardrop Saloon. Once placed, it can be moved by holding left-click, or by using a tool.
- 1.0: Introduced.
- 1.4: Fixed bug where an entire stack of Duck Mayonnaise would be consumed when interacting with the purple box. Added Korean display name to data files.