The CTD is a much used tool in the world of oceanography. We send it up and down the ocean, from surface to bottom, gathering data and water samples. As depth increases, so does the pressure. And a fun way to demonstrate the crushing pressure of a 1000 meters of water, is to literally crush things! Sending some decorated Polystyrene coffee cups along for a ride is a bit of a tradition on oceanographic cruises.  The result? Some very tiny coffee cups to place upon your desk and remind you of your adventures at sea.