It was sold under the Roman medicine category, but I was suggested that it may actually be early Islamic and made to hold ink. I had been thinking Mediterranean perfume, myself.
Yes, it is pontiled. Top is applied to the body.
It's mostly green, though the very base seems aqua. Oddly, the base seems almost applied, itself (it's also badly cracked). It seems to have been rolled onto the body, if that makes sense?
And then there were two.