LATE 17TH/18TH CENTURY

The indentations for fingers and thumbs made it easier to grasp this drinking vessel, which would have weighed around four kilos when filled.  For a similar example see See Pieter C. Ritsema van Eck and Henrica M. Zijlstra-Zweens, Glass in the Rijksmuseum, Zwolle, 1993, Vol. I, pp. 122-3, no. 168.