Looking for help identifying ancient glass bottle/flask/jug (roman or hebron) perhaps unique item

Hello everybody

I am looking for some help on this item it's weight is about 780 grams it's measures are 18 heigh 13 width 9,5 depth.
It's a heavy piece with thickwanded glass.
I think it's a free blown glass but I am not sure (not an expert on it).
It has a pontil scar on the base.
I am searching for about 2 weeks and going with it by several antiquairs and museums and nobody couldn't tell me how old it is or if it's a reproduction or something I also can't find a piece what lookes a bit like it on Google
I really am interested in this piece history also if someone can help me valuing this item then feel free to do so.
I am really curious about it.
the expert here in the Netherlands looked at my pictures and thought it was some kind of Hebron glass but she has to see it in person to give a good answer (I will eventually go to this expert after the summer period).
For more pictures see my other post.
many thanx in advance.
if it's a repro from the last decade could the pontil then be a fake?
the color is also strange sometimes it looks green in other lighting it looks blue ??
also are there many tiny yellow strange dots in this glass (by looking very closely)
And when you look into the glass it seames to been scratched heavily on the bottom (at the inside).
The glass itself containes very much air bubbles
Many thanks for reading and helping in advance.

Regards Michel