Which object is extremely useless, but you just can‘t get rid of it because it reminds you of something?

This bike is a souvenir from my holiday to Thailand. I bought the bike at a shop next to where I had the best soup I ate there. This bike is always reminiscent of the soup I had there, the soup I will never have again and can't recreate. It is a reminder that always gets me hungry for soup, but has no further function.

Marijn, 24