This is a classic sewing product, you've probably seen this in your grandma's sewing box? Use it to keep track of your pins and needles.
The classic design of the tomato has a tiny strawberry on the side is designed to clean your needles.
This humble pincushion has auspicious origins, from Wikipedia....
It is commonly stated that the origin of this design was a belief that placing a tomato on the mantel of a new house guaranteed prosperity and repelled evil spirits and that if tomatoes were out of season, families improvised by using a round ball of red fabric filled with sand or sawdust, which also became a place to store pins.