Engineers are a funny lot. They have a worldview that take literalism to new extremes, and the word "approximately" is a curseword. Give an engineer a scientific calculator and a big enough pile of Legos, and they'll eventually build a lunar orbiter. Most mortals don't understand this. This mug offers a convenient definition of exactly what an engineer is and what it is that they do. This mug is useful for both engineers and non-engineers alike, as the engineer can use this mug to explain themselves (since verbal communication is generally not high on their list of desirable attributes).