I have to admit, I was thinking the same thing as the oldwrangler, although not a bic. I would spin a pen out of oak, being that oak is a typical wood used in the making of wine. I would make a closed end rollerball where the closed end of the rollerball was shaped like a cork and stick it in the top of the bottle. Of course, I would use a nice figured red oak. I would also consider spinning two small handles with tiny tennons on the ends and perhaps stick that into each side of the pen just above the cork shape, which would make the pen look like a bottle opener...you could even dissassemble a cork screw and insert that into the closed end..then it would look like a pen in a cork with a cork screw...something like that...I'm just thinking here..a cork screw pen inserted in the bottle..the bottle is the pen holder as suggested before. Heck, you can make a corkscrew pen, keep the original cork and bottle, you can twist the pen into the cork for storage/display. I am liking where I'm going with this, I'd like to see the bottle cut in half to reduce the height as well, mounted to a nice block of wood on the bottom.
You can put a brass plate on the front of the display announcing the importance, like first anniversary or whatever...or perhaps even better ..." I don't have a drinking problem...I drink, I get drunk, I fall down...no problem!"