It takes a logo promotional bottle cap shaped opener to open a bottle cap.
A brushed cotton structured Promotional Baseball Cap with Bottle Opener with handy built-in bottle opener on the underside of the bill.
Corky Bottle Opener Snapback Promotional Trucker Cap with patented integrated bottle opener in visor of this hat.
A unique Unstructured Baseball Cap with a built-in custom imprinted bottle opener. Who wouldn't want one?