An enormous 22-oz ceramic coffee mug, printed with "This is not enough coffee" on one side, and a drawing from Toothpaste For Dinner on the other side. If you're right-handed, the text will face out as you're drinking.
22 ounces is TWICE the size of a normal coffee cup. That's half the trips to the coffeepot. Half the conversations with your coworkers. And a larger volume of coffee stays warmer for a longer time.
Ships encased in a ridiculous amount of bubble-wrap to arrive without breakage. It weighs two pounds, because it's huge.