Vessels made by inflating a gob of glass on the end of a blowpipe into a reusable mold. Decorative mold-blowing of glass originated provinces of Judaea or Syria, or both, around 45 A.D., within a decade such vessels were in use in Roman Britain. The technique was probably borrowed from mold-casting of the pottery, and copied the decorative motifs then in vogue for Roman bronze and pottery vessels. Molds were usually made of clay or plaster, sometimes stone or sheet bronze, and were usually in two or more parts for easier separation from the cooled glass. The technique was probably difficult and time consuming. Use of mold-blowing declined late in the 1st century A.D., replaced by crisp geometric designs created using using simple abrasive tools and a lathe. There was minor revival of mold-blowing in the eastern provinces during the 3rd century A.D., a grape cluster becoming a popular body shape for bottles and jugs.