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
While Chris Plante of "The Verge" commented, "to my surprise, Fairlife tastes, well, like milk. It looks and feels a little thicker than traditional milk, and has a slightly richer taste, especially the chocolate milk, which sits on the spectrum between chocolate shake and milk that's stewed on a lazy Saturday morning in a bowl of Cocoa Puffs," he criticized the aftertaste, stating, "Fairlife's aftertaste is less appealing. A few minutes sipping a cup of chocolate Fairlife and then a cup of 2% Fairlife, the inside of my mouth had that malty feel that chases a protein shake." Rachel Sanders of "Buzzfeed" observed, "Fairlife is a little bit creepy to drink. The texture is much more viscous and thick than regular milk, and the odor is really strong, to the point that it smells almost spoiled. It tastes OK, but has a slightly musky flavor that reminds me of shelf-stable or reconstituted milk."