Booking Through Thursday

What items have you ever used as a bookmark? What is the most unusual item you’ve ever used or seen used?

I usually use cardboard bookmarks (my trust old Han Solo bookmark, a wolf themed one, one featuring the statue of David, and one that has the Colosseum in it) and one bookmark which looks like a medallion. I don’t think that I’ve ever seen anyone use anything more exotic than a receipt or a bill as a bookmark. And bending the corner of the book, of course.