A liquid hydrogen tanktainer is a large container that is used to transport liquid hydrogen gas. It is made of a very strong material that keeps the hydrogen inside but can still be moved around. Inside the tanktainer there are metal tanks that contain the liquid hydrogen. When the tanktainer is filled with liquid hydrogen, it can be loaded onto a truck or train and transported to the place where it will be used. Liquid hydrogen can be used to power vehicles and airplanes, or to make products like food and plastic.