Ice cubes are small pieces of ice that are often cubes. These pieces are sometimes used to cool drinks. Ice cubes are used in mixed drinks, when the drink has the words "on the rocks."
Ice cubes are made by filling a tray with water and putting it in a freezer. Many freezers also have an icemaker. Icemakers make ice cubes and put them in a bin. After that, they can be put in a glass.