Art Nouveau glass is fine glass in the Art Nouveau style. Typically the forms are undulating, sinuous and colorful art, usually inspired by natural forms. Pieces are generally larger than drinking glasses, and decorative rather than practical, other than for use as vases and lighting fittings; there is little tableware. Prominently makers, from the 1890s onwards, are in France René Lalique, Emile Gallé and the Daum brothers, the American Louis Comfort Tiffany, Christopher Dresser in Scotland and England, and Friedrich Zitzman, Karl Koepping and Max Ritter von Spaun in Germany. Art Nouveau glass included decorative objects, vases, lamps, and stained glass windows. It was usually made by hand, and was usually colored with metal oxides while in a molten state in a furnace.