Roman "snake-thread" glasses are so-called because of their sinuous patterns of applied ornament, which sometimes include birds and animals, but more often consist of leaves or abstract motifs. Glass of this type may be completely colorless, or have a colorless body with colored decoration. Snake-thread glasses were produced in two parts of the Roman world: in the eastern provinces and in the northwest. The earliest examples date from the late second century A.D. and the latest were probably made around the year 300. Our new acquisition is a snake-thread bottle decorated with tendrils and ivy leaves on long, snakelike stems. Four leaves and stems surround the body of the bottle. Two are opaque white and two are light blue; all of them were impressed with a tool while the glass was still soft, creating the corrugated surface that is typical of snake-thread decoration. Between each pair of leaves are tendrils with spiral ends. The tendrils are made of gilded, colorless glass. The bottle was made in the third century, probably in Cologne, Germany, an important city on the northern frontier of the Roman Empire and a great center of glassmaking.