A soda fountain is a device that dispenses carbonated soft drinks, called fountain drinks. They can be found in restaurants, concession stands and other locations such as convenience stores. The machine combines flavored syrup or syrup concentrate and carbon dioxide with chilled and purified water to make soft drinks, either manually, or in a vending machine which is essentially an automated soda fountain that is operated using a soda gun. Today, the syrup often is pumped from a special container called a bag-in-box (BiB).
Fountain coke is an often confused term normally referring to a handheld dispenser behind a bar or counter that are used in many countries, including Spain, France and the United Kingdom. The term 'fountain' helps differentiate from 'machine' cola, as the fountain is more easily controlled and offers more flavours.
A soda fountain is also referred to as a postmix machine in some markets. Any brand of soft drink that is available as postmix syrup may be dispensed by a fountain.
The term may also refer to a small eating establishment, soda shop or luncheonette, common from the late 19th century until the mid-20th century, often inside a drugstore, candy store or other business, where a soda jerk served carbonated beverages, ice cream, and sometimes light meals. The soda jerk's fountain generally dispensed only unflavored carbonated water, to which various syrups were added by hand only.