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A "jug"/goblet found in the excavations of the Jewish Quarter in Jerusalem—the wealthy Upper City quarter of Second Temple Jerusalem. It dates to the first century A.D. and was "blown" by the famous artisan from Sidon—Ennion. The first two letters (in Greek) of Ennion are visible just right of center.
The small goblet (a drinking cup with a stem and base), along with other glass objects indicates the "sophistication" of the inhabitants of the Upper City of Jerusalem (= on the western hill).
"Artisans eventually discovered that fashionable tableware could be produced with relative ease by blowing glass directly into molds similar to those employed for casting metal objects. The technique, called mold–blowing, was developed in the 1st century CE in Sidon, an important glassworking center on the Eastern Mediterranean coast. Similar vessels were also manufactured in Italy, possibly by Sidonian expatriates. Using this technique artisans could produce a series of vessels bearing the same motifs with a single mold." (from the description in the Israel Museum).