Last Updated: Sep 17, 2016     Views: 4

One of the best sources for information about cage cups is the exhibit catalog, Glass of the Caesars.

Harden, Donald B. Glass of the Caesars. Milan: Olivetti, 1987. Exhibition at The Corning Museum of Glass, Corning; The British Museum, London; and Römische-Germanisches Museum, Cologne.
Cage cups, pp. 238-249, 251-254.