Like human's face, the mouth of cup always face in front, while you are talking to other people, or praying to your god, whenever you are serious, you will face to the object that you are focus on. Therefore, love is the most devotional belief, so I believe when you are missing someone, you will also want to turn to it's direction and send it your yearning, and this is the idea of my thesis - The Missing Cups. You and your lover will share a set of two cups, each person has one, and wherever you both are, both cups will turn to face to another, which will lets the owner knows the people you are missing, is one the extended line of the cup is point to.