Hi John, that's a nice example of an aqua green Pinaud bottle that (more than likely) held Lilac Vegetal.
The top and cap would have been zinc alloy and has long since corroded away.
Impossible to find separately but still available with some vintage bottles for sale.
Your bottle would have looked like the advert on the left and the cap would have been
the same as the middle pic.
Until we have easy access to 3-D printers, we'll have to use good old fashioned corks
like the right-hand pic.
Attachment 214815