In Pemberton's original formula, he added five ounces of coca leaf (cocaine) per gallon of syrup. Candler claimed that he altered the formula and Coca-Cola-100.php">only added a tenth of the amount. Coca Cola once contained an estimate of nine milligrams of cocaine per glass. It wasn't until 1903 that it was removed from the drink altogether, replacing it with coca flavoring. "New Coke" came out in 1985 after Coca-Cola attempted to change the original formula. Most consumers preferred the taste of the original Coca-Cola, and many ceased purchasing the product until the company switched back to the original formula. It was renamed Coca Cola Classic to show consumers that the drink had reverted back to its original formula. By the 21st century, Coca Cola history took another leap in the market. In 2005, the company launched "Diet Coke", sweetened with artificial flavors. Later in 2005, it announced "Coca Cola Zero", sweetened with aspartame and acesulfame potassium. Since then, the company has produced other products containing the same Coca-Cola formula with minor differences.

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