7 Up was created by Charles Leiper Grigg. Grigg came up with the formula for a lemon-lime soft drink in 1929. The product, originally named “Bib-Label Lithiated Lemon-Lime Soda”, was launched two weeks before the Wall Street Crash of 1929. It contained lithium citrate, a mood-stabilizing drug, until 1950. Its name was later shortened to “7 Up Lithiated Lemon Soda” before being further shortened to just “7 Up” by 1936. The origin of the name is unclear, though Britvic claims that the name comes from the seven main ingredients in the drink, while others have claimed that the number was a coded reference to the lithium contained in the original recipe, which has an atomic mass of approximately 7.