Four Loko is a line of alcoholic beverages, originally marketed as energy drinks, sold by Phusion Projects of Chicago, Illinois. Phusion operates as Drink Four Brewing Company.^[1] Four Loko, the company’s most popular beverage, debuted in the United States market in 2005. It is now sold in 48 states and in Canada & Europe. ^[2] The name “Four” is derived from the original energy drink’s four main ingredients:alcohol, caffeine, taurine, and guarana .