Years ago when I had more shop time, I made all kinds of little projects I'd sell. To protect them from damage, I started mailing them inside small tins. Soon I started telling family members to save any little tin containers for me. They kept it up even after I slowed down in the shop, so I ended up sorta becoming an unofficial collector of small tins. Even today, every time my folks travel somewhere, my mom brings me back a small tin of mints from that area as a souvenir.