Sun Drop is a citrus-flavored soft drink produced by Keurig Dr Pepper with a yellowish-green color. Among soft drinks, it is known for its high caffeine content. Orange juice is an ingredient in the drink, and remaining pulp matter from the orange juice provides some of the soft drink's taste and appearance. Sun Drop competes primarily against The Coca-Cola Company's Mello Yello and PepsiCo's Mountain Dew. History Sun Drop was developed in Missouri by Charles Lazier, a salesman of beverage concentrates. While riding around town in the family car, Lazier quickly scribbled a recipe for a new soft drink on a small piece of paper which he handed to his son, Charles Jr. The younger Lazier worked as a lab technician at his father’s plant, and soon began work on the formula. Two years later, Sun Drop Cola debuted at the American Bottlers of Carbonated Beverages Conference in Washington, D.C. The Sun Drop formula was patented on April 15, 1930. The drink was marketed in several Southern states under names such as "Sundrop Golden Cola" or "Golden Girl Cola." The brand was acquired and standardized by Crush International in 1970. Crush International was purchased by Procter & Gamble in 1980, which sold its soft drinks holdings to Cadbury Schweppes plc in 1989. Cadbury Schweppes demerged in 2008, with its beverage unit becoming Keurig Dr Pepper, which currently produces Sun Drop. Prior to the sale to Cadbury Schweppes, Procter & Gamble introduced several new Sun Drop flavors in 1985, including a reformulated Diet Sun Drop brand using aspartame instead of saccharin. A third brand, Cherry-Lemon Sun Drop, was introduced that same year. In February 2002, the brand introduced Caffeine-Free Sun Drop to the portfolio after the company received numerous requests from loyal consumers for a caffeine-free version of their favorite citrus soft drink. A diet variant of Cherry Lemon Sun Drop was introduced 2014. Sun Drop has maintained popularity in many parts of the Southern United States, especially in Kentucky, Tennessee, North Carolina and parts of the Midwestern United States, including Wisconsin and western Minnesota. Similar to other regional drinks with a cult following, fans outside bottling areas have been known to pay large amounts to have the drink shipped to them. Families have sent it to U.S. soldiers serving in Afghanistan. Sun Drop is sometimes used as a mixer for drinks with hard liquor. Sun Drop is the official drink