Wilhelm Wagenfeld trained in silversmithing, printmaking and design, and joined the Bauhaus metal workshops in 1923. He then taught at the Bauhaus from 1926 to 1931. Wagenfeld later moved into glass design, working for Jenaer Glaswerk and Vereinighte Lausitzer Glaswerke AG, where he developed designs for heat-resistant glass. He was one of the few members of the Bauhaus to work successfully in industry, designing mass-produced objects according to modernist principles of simplicity and function.The Bauhaus actively opposed the use of objects as markers of status and identity. Bauhaus philosophy dictated that objects should be visible only to the extent that they served some useful function. Wagenfeld’s glass tea service embodies this idea, the transparent vessels becoming visible only when full of liquid and in use.