ESTATE SALE FIND, 3 NEW OLD STOCK  BOTTLE CAPS. This Pic-A-Pop TONIC WATER bottle cap crown is a must-have for any serious collector. With its vibrant blue color, it is sure to catch the eye and make a great addition to your collection. This NOS (new old stock) piece is super rare and hard to come by, making it an even more valuable find for collectors of soda advertising memorabilia. Don't miss your chance to own a piece of history.