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.
Fairlife
In regard to Coca-Cola's strategy for Fairlife, the company's North America President Sandy Douglas stated, "Our vision for the nutrition beverage business and the milk product that I showed you which is made on a sustainable dairy with fully sustainable high-care processes with animals, has a proprietary milk filtering process that allows you to increase protein by 50 percent, take sugar down by 30 percent, and have no lactose, and a milk that's premiumised and taste better and we'll charge twice as much for it as the milk we're used to buying in a jug." The cost of Fairlife is indeed, roughly twice as high as conventional milk; Fairlife's national average price in the US is $4.29 per 52 oz., compared to the national average pricing of conventional milk at $2 per 64 oz.