Coca-Cola
It's no coincidence that the name "Coca-Cola" starts with the name of the leaf used to manufacture cocaine: the coca leaf. From the late 1800's, Coca-Cola contained varying amounts of cocaine (about 60mg of cocaine per serving in 1900) all the way up until 1929, when cocaine was finally removed from its formula. That was when all the doctors and dentists who were prescribing coke to their patients said, in unison, "Guess we'll have to start actually addressing their medical problems instead of sending them home with more cocaine." Simultaneously, Coca-Cola executives probably said, "Guess we'll have to find another ingredient that's highly addictive." Hence, caffeine. But that's not until later in this story.
The "Cola" part of the name comes from the "kola" nut (shown here) -- a nut containing yet an addictive chemical: caffeine. Combine caffeine and cocaine and, not surprisingly, you get a powerful drink called "Coca-Cola" that benefited strongly (from a marketing point of view) from the addictive traits of the narcotic / caffeine combination. It's "The Real Thing," all right, real substance addiction! Hard drugs and Starbucks, all in the same cup!
Not surprisingly, the Coca-Cola company claimed all sorts of health benefits for their product. Coca-Cola was introduced in 1886 as "a valuable brain-tonic and cure for all nervous afflictions." Its slogan in 1900 was, "For headache and exhaustion, drink Coca-Cola," a slogan that now seems ridiculous for a beverage perhaps known best for its ability to cause obesity. A 1904 Coca-Cola slogan claims, "Coca-Cola is a delightful, palatable, healthful beverage," and even in recent years, Coca-Cola has called its product "a wholesome beverage. They’re still using coca leaves.