Glass Beer Stein "Stein" may have originated as an abbreviation of German Steinzeug or Steingut (stoneware) or of Steinkrug (stoneware jug), based on the common material for beer mugs before the introduction of glass. Ordinary German beer mugs have been made out of glass for hygienic reasons since the introduction of glass mugs to the 1892 Oktoberfest. Shot with a Canon 5d mkIV. One Eiinstein light gelled with yellow.