Sierra Mist is a lemon-lime flavored soft drink produced by PepsiCo. It was first introduced in 1999 as a competitor to Coca-Cola's Sprite and Dr Pepper's 7 Up. The beverage is known for its crisp, refreshing taste and is often enjoyed on its own or as a mixer in various cocktails. In 2020, Sierra Mist was reformulated and rebranded as Mist Twst, but the original name was later reinstated. The drink is available in regular and diet versions, catering to different consumer preferences. Sierra Mist is widely available in grocery stores, restaurants, and vending machines across the United States.