Cola by citric or other isolated acids. Coca-Cola's recipe is maintained as a corporate trade secret. A variety of different sweeteners may be added to cola, often partly dependent on local agricultural policy. High-fructose corn syrup (HFCS) is predominantly used in the United States and Canada due to the lower cost of government-subsidized corn. In Europe, however, HFCS is subject to production quotas designed to encourage the production of sugar; sugar is thus typically used to sweeten sodas. In addition, stevia or an artificial sweetener may be used; "sugar-free" or "diet" colas typically contain artificial sweeteners only. In the 1940s, Coca-Cola
Coca-Cola (its competitor Pepsi stayed out of Israel). Mecca Cola and Pepsi have been successful alternatives in the Middle East. A Coca-Cola fountain dispenser (officially a Fluids Generic Bioprocessing Apparatus or FGBA) was developed for use on the Space Shuttle as a test bed to determine if carbonated beverages can be produced from separately stored carbon dioxide, water, and flavored syrups and determine if the resulting fluids can be made available for consumption without bubble nucleation and resulting foam formation. FGBA-1 flew on STS-63 in 1995 and dispensed pre-mixed beverages, followed by FGBA-2 on STS-77 the next year. The latter mixed