ever wonder “Why do you taste so good?” well, i’m gonna spill the juice. “there are many reasons the coca-cola® tastes so great at mcdonald’s. we simply follow the guidelines set by coca-cola® and take steps to ensure that we serve a high-quality fountain beverage.” “the water and coca-cola® syrup are pre-chilled before entering our fountain dispensers with the ratio of syrup set to allow for ice to melt. we also keep our fountain beverage system cold so your drink is always refreshing.”