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
Double Cola Yet Double Cola is a distinctive part of culture in Southern Indiana, especially around Evansville (for example, Double Cola Fields). It was once marketed as a lower-cost alternative to Coca-Cola and other soft drinks, but Double Cola is now marketed as a premium brand in that area, with the same or higher price than Coca-Cola or Pepsi-Cola. Diet versions of both Double Cola and Ski have been developed in recent years. The "Jumbo" line of fruit-flavored drinks has been expanded to include peach, strawberry, pineapple, fruit punch, root beer, and blue creme soda. Some of these drinks are available only