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
Jolt Cola smaller "Quick Fix" cans ( single-use pull-tab aluminum cans, similar to those used for Red Bull) and "battery" cans ( resealable aluminum cans with the same twist-off top as the battery bottles). The Jolt Cola website claimed that the "Quick Fix" sizes were available at establishments that serve "adult beverages," for use as a mixer. The flavors of Jolt offered were also changed. Flavors offered were Cola, Blue Raspberry, Cherry Bomb (cherry cola), Silver (lemon-lime), Wild Grape, Orange Blast, Passionfruit (featuring a yellow can) and Ultra (a diet drink with Splenda as its artificial sweetener alongside guarana, ginseng, taurine, and