Cube Tube is a vertical ice cube tray that prevents you from spilling water while transporting a full tray of water to your freezer. It also provides the user better control while dropping the ice into a drink. Just fill the tube, insert the divider, seal the tube and freeze. Once it’s frozen, hit the flexible bottom against a hard surface. This will loosen up the ice to be pulled out (and probably relieve some stress). The tube is designed with a slight draft to make pulling the ice out easier.