What are the main classifications of bottle caps?
Collectors use a variety of terms to describe their collecting interests. Aside from the straight-forward designations of beer, soda, water & other, there are others such as: unused (factory shapes, never capped on a bottle); used; and undamaged (not folded on the top of the crown). They can be grouped into eras, from cone-top can closures to twist-top caps. And like postage stamps, a crowncap can be classified as definitive (identifying a product) or commemmorative (celebrating a person, place, thing or event), and can be part of a collectors’ series.
