If you fill a small bag of coffee it acts like an extra hand to the robot. It can pick up many things without a problem. It is just a simple gripper that is made from a bag of coffee grounds and vacuum. The way the robot moves any object from a liquid-acting to solid shape is using a processes called jamming. The gripper's bulb sticks to any shape evenly before the vacuum jams it. The first reason it was invented was to pick up stuff that you do not know what you are dealing with. It is different from our hand because it grips the object from a very different angle. It cam even pick up a raw egg! Is that not cool? The gripper has to apply pressure to the object to mold its shape. Not to little pressure or it will not hold the object, and not to much pressure or then it might break the object.