Diet Coke
Diet Coke does not use a modified form of the Coca-Cola recipe, but instead an entirely different formula. The controversial New Coke, introduced in 1985, used a version of the Diet Coke recipe that contained high fructose corn syrup and had a slightly different balance of ingredients. In 2004, Coca-Cola introduced Coca-Cola C2, which it claims tastes much closer to Coca-Cola but contains half the carbohydrates. In 2005, the company introduced Coca-Cola Zero (replaced by "Coca-Cola Zero Sugar" in 2017), a sugar-free variation of regular Coca-Cola.
Coca-Cola with Lime
Coca-Cola with Lime was a variation of the original Coca-Cola. It was introduced in North America in the first quarter of 2005, before being quietly discontinued in 2006. The formula is the same as regular Coke but with added lime flavor. The decision to market the product was based on popular feedback from consumers in 2004, with the release of Diet Coke with Lime.