A fountain drink is a beverage dispensed from a machine, typically found in restaurants, convenience stores, and fast-food outlets. These machines mix carbonated water with flavored syrups to create a variety of soft drinks, such as Coca-Cola, Sprite, and Dr. Pepper. Customers can often choose their drink size and may have the option to add ice. Fountain drinks are popular due to their convenience and customizable options. Many machines allow users to mix different flavors or create unique combinations. They are often served in disposable cups, making them easy to take on the go.