Perhaps you've found yourself in a high or even low profile job in which you're constantly being bothered with people's petty issues. Place a Grenade Mug on the edge of your desk, and I wonder if you won't get a little more peace and quiet, or at least a few laughs.
This army-esque teacup is shaped like a hand grenade, complete with a striker lever as a handle and a fake pin. The bomb drinking vessel reads "Complaint Department: Please Take a Number," essentially inviting the unsatisfied to pull the pin, detonate the device and blow himself up.
Of course, the Grenade Mug is simply a 12-ounce ceramic coffee cup with attitude, and not an actual weapon. Whether it's interpreted as humor or anger, it depends on the nature of the man who drinks from it.