Diet 7 Up Drinks - A diet lemon-lime soft drink. 7 Up (sometimes spelled Seven Up) is the brand name of a lemon-lime flavored soft drink marketed by Dr Pepper/Seven Up, Inc. (DPSU) in the United States (a unit of Cadbury-Schweppes since 1995). It has been bottled by Britvic in Britain since 1987. Outside of the United States, the trademark to 7 Up belongs to PepsiCo. 7 Up, originally named Bib-Label Lithiated Lemon-Lime Soda, was concocted in 1929 in Saint Louis, Missouri. It originally contained lithium citrate, a mood-stabilizing drug.