How much caffeine is in a can of coke?

In other countries, where cyclamates were not banned, as they were in the U.S. and the United Kingdom in 1970, Diet Coke or Coca-Cola Light may be sweetened with a blend containing cyclamates, aspartame, and acesulfame potassium. Fans of the drink often express a strong preference for either the European formula or the American-British-Canadian version. Contrary to some reports, Coca-Cola Zero is not the European Coca-Cola Light formula.