It is made from aromatic herbs from 43 countries that undergo inspections and are formulated based on a secret recipe of the Underberg family, whose members are personally responsible for the production of the drink.

[1][2] Underberg is classified under "food and drinks: oils, herbs and spices" in the United States and can be sold without any sort of liquor license.

The drink is usually associated with its portion-sized 20 ml bottle, designed in 1949 by Emil Underberg, grandson of the founder.

[6] All of its elements, including shape of the bottle, color, packaging and the Underberg name are trademarked and copyrighted.

Notable fans of Underberg in the modern era include MF Doom, Amon Amarth, Chumlee, and Setfive Consulting.