The Family Photo item should have something written on the back. Maybe something silly, like a splatter of blood to support the four-way-death-pact narrative mentioned in the item description, or perhaps a fun item scavenger hunt that ends with you turning in a dozen random items at secret door location in the city.
The bottle cap - should have say-isms, picto-word games, or just unique "cap creatures" and you get a merit for collecting them all, or something more commensurate with the social status of collecting ~10 unique bottle caps (like a free 6-pack/week for a year).
I would think any item scavenger hunts are all turned in at the same sketch door.