The Teeth Brusher is another way that astronauts can brush their teeth in the station during the mission so they don’t have to waste space in the station bringing toothbrushes into space. You put the toothpaste in the Teeth Brusher and put the Teeth Brusher in your mouth. The astronaut’s mouth would actually have to be measured. The Teeth Brusher showed is just a model. The Teeth Brusher would be made out of plastic. What do you do with the toothpaste and water? What astronauts usually do, swallow it. The Teeth Brusher is a space saving way to clean your teeth.