Sierra Mist’s new Natural flavor is made with real sugar and nothing artificial. With only 5 simple ingredients that let the pure delicious flavor of lemon-lime shine through, this Natural taste will be sure to tickle your taste buds. By keeping their products caffeine free, you can enjoy them at all hours of the day! This beverage also comes in diet forms and alternate flavors. The Ruby Splash has a hint of grapefruit with the bubbly composition.