you can buy similar items here:
LARGER ROMAN GLASS FLASK, circa 4th century AD. Everted rim, long cylindrical neck, piriform body. Pale bluish-green hue with some interior cloudiness. Height: 17.6cm. Intact. A larger than usual example. $1450.
Bloody Roman’s! they are worse than the Chinese!
Christ! I can’t take a bath without half of a dozen of them climbing in!