This listing is for a Cork Lined Vintage Double Cola Bottle Cap.  The one inch vintage bottle cap has a cork lining on the underside of it.  This is what would have created the seal for the bottle cap to the bottle.  These vintage bottle caps are vintage in that they will show a little wear and tear and are not perfect as a brand new one would be. 

These make great gifts for those avid collectors of all things vintage or especially for the collectors of Double Cola paraphernalia.

Please see below for more information.