It was created by Eli Branchwater in 1872 when he discovered the Well of Addad in Haffir, Karocco, Africa. He used its addictive waters and cola nuts from Santa Prisca as the main ingredients.
Branchwater's descendent later hired Galiant to overthrow Santa Prisca’s government to keep his supply lines coming. He also had the Collector keep the Well of Addad's secret. After the reservoir was destroyed, sales on Zesti went into a downturn and the company began seeking a substitute for the Addad well water.