was a concoction which contained between 70% and 80% alcohol by weight. The U.S. Treasury Department required changes to the ingredients of Jamaica Ginger to discourage its abuse. The minimum requirement of ginger solids per cubic centimeter of alcohol resulted in a bitter concoction that was not palatable. Two bootleggers (Harry Gross and his brother-in-law Max Reisman) developed an alternative recipe that could pass the inspection and taste well enough to sell by adding tri-ortho-cresyl phosphate (TOCP) to the mixture.