I just bought mine secondhand. The listing stated it was PC, and I do indeed think it is (or is possibly a mix of the two) based on the pictures already posted. The cookie is smaller and the sandwich is definitely made of clay, but the egg has noticeable paprika on it.
The tin could use some polishing, but at least it is not rusted over (still has some shine to it).
The napkin is a napkin. Not much to say there.
This is my first lunch/food accessory set (hoping to get one more), so for now, I am happy to at least have some food for my dolls to play with/pose for pictures with. Plus, I love tea, so to be carrying around lunch in a tea tin seems quite appropriate.