Yes, that's right, Pranksters! Now you see it, Now you don't! Its just like magic!
Seriously, how many times have you wanted to soak an annoying coworker with ink during one of your dull morning meetings? You know, the guy who sits right next to the boss, and ask question after question, turning a quick 30-minute meeting into a 2-hour marathon? Well, bring this pen with you and you can.
and you don't even need to worry about getting into trouble. By the time your unlucky prank target goes to complain, it will have all but disappeared!