Coca Cola is an American Carbonated soft drink produced by the Coca-Cola Company. It was invented in the late 19th century by John Pemberton. The drink's name refers to two of its original ingredients, which were kola nuts (a source of caffeine) and coca leaves. The Coca-Cola Company has on occasion introduced other cola drinks under the Coke name. The most common of these is Diet Coke, with others including Caffeine-Free, Diet Coke Caffeine-Free, Cherry, Zero, Vanilla and special versions with lemon, lime and coffee.