I found a brand of gin called "Prestige Edition" that comes in a bottle that has the same unremarkable shape as the one in the picture. At just over $5 a bottle I'm sure it comes with a free headache. Perhaps something I can wash my paintbrushes with.
The bottles were all different in the film... when I was making the label, someone here kindly posted a photo of their production used version, but I have yet to find it onscreen. I'll see if I can dig up my screencaps.