A Gift from New York

My friends M and E (along with K) spent the day in NYC and look what they brought home for me!

This is a challenge to photograph as the camera wishes to focus on the flat surface rather than the 'etched' image on the interior.

This is totally amazing to me.  Especially all the reflections from the top.

How do they make these?  3 - D and all the fine lines...inside.
Baffling.  Thank you!

p.s.  I got a nifty Statue of Liberty pencil, too.  It is displayed next to a Statue of Liberty pen!