Hello Pearly, welcome to the Glass Message Board, and thank you for sharing this beautiful find with us.
I have a couple of 'ordinary' Gluk Gluk bottles, but have never seen one like this.
Nic, you always seem to have the answer to the tricky pieces, we learn so much from you... Pearly is lucky you were able to identify this so quickly.
A really cleverly made glass decanter that will surely be a conversation piece at many a gathering.