This is the $13 Star Trek Borg Cube coffee mug available exclusively from ThinkGeek. It's a square coffee mug that holds 12 ounces of coffee and booze and looks like a Borg Cube. A cube is a pretty unique shape for a coffee mug. There is no way somebody else at work could accidentally mistake that mug for their own. And if they do, well, you know what to do. "Assimilate them?" Okay I was going to say sneak up from behind and smash their own coffee mug over their head, but sure, you go "assimilate", whatever the hell that means. I think you're in this Star Trek thing too deep.
Keep going for two more shots.
Thanks to JR, who designed a spherical Death Star coffee mug but it's so round it just rolls around on your desk spilling hot coffee everywhere.