Lithium Concentrations in Groundwater Used as Drinking Water for the Conterminous United States.

[erronis]

3. Fascinating. Wikipedia article

https://en.wikipedia.org/wiki/7_Up

7 Up was created by Charles Leiper Grigg, who launched his St. Louis–based company The Howdy Corporation in 1920.[1] 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.[2] It contained lithium citrate, a mood-stabilizing drug, until 1948.[3][4] It was one of a number of patent medicine products popular in the late-19th and early-20th centuries. Its name was later shortened to "7 Up Lithiated Lemon Soda" before being further shortened to just "7 Up" by 1936.[5]

The origin of the revised name is unclear.[6] Britvic claims that the name comes from the seven main ingredients in the drink,[a][8] 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 7.[9] Britvic also claims that the name alluded to 7 Up seven-ounce bottles when Coca-Cola and most other soft drinks were bottled in six-ounce bottles.