Chris, Here is another photo as requested.
Harry, thanks for your comments and questions. I have seen bottles from Passover wines but never a ceremonial bottle for a Passover seder. None of my Judaica collector friends have seen anything like this. So, it may be possible that this is a unique item.
I don't know enough about bottles to answer them but I will try. I do not see any mold seams. The lip is not perfectly round.The two glass neck rings are not perfectly round either. The blue rings seem to be some sort of glaze.
Does this help?