This is the Moon Glass, a ceramic cup that displays different phases of the moon as you drink from it (available in sets of two small or large cups for $24 or $30). That way you can daydream you're out laying in a field stargazing and not stuck behind a computer desk sending redundant emails to the idiots you have to work with. I am going to punch Tony in the face by the end of the day, I can already feel it. Dave's not far behind him. He's at least getting an unnecessarily hard pat on the back.
Keep going for a couple more shots of the glass, which is actually made to be filled with rice wine, hence the nice moon-y color.