I’m not really sure if anyone has a definitive answer. I guess he could be used for either. In any case, I put  him up for “adoption” on eBay, and Philip Lamb took him in.  Now known as “Johnny,” it looks like he went to a very good home.

Here’s a link if you would like to view Johnny in his new home with his rather large extended “bottle cap” family:

http://www.philiplamb.com/Bottle.html