Ice, to a mixologist, is a type of drink garnish that is used to chill and add flavor to cocktails. It is typically made from frozen water and can come in various shapes and sizes. ROCKS ice is a specific type of ice that is larger than regular cubes and is often used in drinks such as Old Fashioneds and Manhattans. It is usually served in an old-fashioned glass and is meant to be stirred into the drink.