Around 1930 Copier, inluenced by 'De Stijl', designed vases of a pure and elementary form. His vases were of cube- and cylinder-shape and of simple colour and had a loose black base. Examples of these vases and stands are in the collections of the Stedelijk Museum, Amsterdam, the Boymans-van Beuningen Museum, Rotterdam and in the Corning Museum of Glass

Frans Leidelmeijer en Daan van der Cingel, Art Nouveau en Art Deco in Nederland, 1983, p. 173, no. 201 & 202 for similar vases
Reino Liefkes, Copier, Glasontwerper/Glaskunstenaar, Leerdam, 1989, p. 55, no. 60 for an illustration of a vase from this series
Wendingen, vol. 1930, issue 10, p. 11-14

See illustration