The wittily designed Zipmark Bookmark makes a great gift idea for bookworms or students.
Designed to look like a zipper, it gives the impression that you could literally unzip your book to open it up.
A clever illusion, it is actually a thin plastic strip sandwiched between the pages of your book. and on top of that is a slender section molded in the shape of a zip. But it will make people look twice.