Rhenish glass was produced along the Rhine from as early as the third century AD, with glass factories (probably Roman in origin) excavated in several locations, including Worms and Cologne. The glass produced by the Saxons would have enjoyed a variety of uses, from vessels to windows to jewellery: this glass beaker, however, arguably does not classify as tableware. As is typical of the period, the base is insubstantial, making the vessel top-heavy and unstable. The suggestion, therefore, is that the vessel should be held in the hand until the drink is completed.
The pale green tinge of the colourless glass can be explained by the high level of iron in its chemical composition.