There is a wide variety of soft drinks, including “clear,” cola, fruit flavors, and other flavors such as root beer and cream sodas. Clear soft drinks contain water, carbon dioxide, sweetener, flavors such as ginger, lemon, or lime, and other additives and preservatives. Colas contain the ingredients of clear soft drinks, with the addition of caffeine and coloring. Fruit soft drinks contain the ingredients of clear soft drinks, with the addition of fruit oils or flavorings and coloring. Diet soft drinks substitute a non-calorie sweetener, such as aspartame, in place of sugar or corn sweetener. Natural varieties, which use natural sweeteners and are free of artificial colors, flavors, and preservatives, are also available.