With the outbreak of World War I, the Wiener Werkstätte and its associated production facilities faced personnel shortages and sales problems. Among their compensation efforts was the production of war glasses, which proved especially successful as the ministry of public works requested in 1915 that artists “express the patriotic purpose” in their works; in February of that year, an exhibition of “war memorabilia” had been held at the Austrian Museum of Art and Industry. In the case of plain, cylindrical drinking glasses, the decoration consisted of linear enamel colors, often representing the colors of the flags of the allied Central Powers. In the present example, the upper part is decorated with the flags of Austria, Hungary and Germany in the shape of an all-round striped pattern, while the flagpoles invest the glass surface with a vertical structure.