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 or sweepstakes entries. In Australia in 2011, Coca-Cola began the "share a Coke" campaign, where the Coca-Cola logo was replaced on the bottles and replaced with first names. Coca-Cola used the 150 most popular names in Australia to print on the bottles. The campaign was paired with a website page, Facebook page, and an online "share a virtual Coke". The same campaign was introduced to Coca-Cola, Diet Coke & Coke Zero bottles and cans in the UK in 2013. Coca-Cola has also advertised its product to be consumed as a breakfast beverage, instead of coffee or tea for the morning