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 Zero Sugar
Coke Zero was originally specifically marketed to men, who are shown to associate "diet" drinks with women. It was primarily marketed towards young adult males and it has been nicknamed "Bloke Coke" in the UK. In the U.S., advertising has been tailored to its targeted market by describing the drink as "calorie-free" rather than "diet", since young adult males are said to associate diet drinks with women. U.S. marketing also emphasized its similarity in taste to sugared Coca-Cola; an advertising campaign for the beverage focused on Coca-Cola executives who were so angry over the drinks' similarities, they were considering suing their co-workers for "taste infringement". Continuing the theme, a Coca-Cola Zero ad aired during Super Bowl XLIII parodied Coke's iconic "Hey Kid, Catch!" commercial, which is interrupted by two Coca-Cola "brand managers" accusing Troy Polamalu of "stealing" their commercial.