PepsiCo. According to relevant public information inquiries, 7-Up (originally known as 7-Up in English) is a lemonade brand of PepsiCo. Outside the United States, 7-Up is a registered trademark of PepsiCo. Seven-Up was originally named Bib-Label Lithiated Lemon-Lime Soda and began production in 1929 in St. Louis, Missouri.