Found in England, Northern France, Germany and the Low Countries, these unique vessels were manufactured mainly during the 6th and 7th century, though there are a few examples that date as late as the 9th century.
These vessels were often made of waldglas, or forest glass and dated to the late medieval and early renaissance period, most being found in Germanic areas, and the Low Countries.
A drinking bottle, the style dating from the early 14th century to the 17th century, with production sites centered in Germany, but also a few possible places in France.