Cork discs and liners
The Cork disc
Shaved or Solid Cork was a inexpensive natural product that was first used as a liner to seal the bottle.
These made a fairly good seal, but there was an occasional leaker with this natural product.
Solid cork liners were used until approximately 1915.
Composition
cork particles or cork waste material originally thrown out, became a new resource when developed into cork rods and cut into disks to replace solid cork liners.
Spot crowns
are regular crown corks to which a "spot" or disc of liner material is attached to the cork liner. This was added to prohibit the beverage from making contact with the cork liner. Dozens of various materials were used for spots, such as paper, aluminum, tin, foil, rubber and vinylite depending on the type of beverage that came into contact with the spot. Aluminum spots were generally used for beer and the others for soda, ginger ale or sparkling water.
Plastic liners
various types of plastic liners have been used to replace the cork liners and some are still in use today.
Corrugations
are the points formed around the skirt of the crown. Different numbers of corrugations were used by various companies, but were later standardized at 21..
Cases & cartons
used for shipping of crowns came in various sizes.

50 Gross Wooden Cases......19" x 12" x 11" deep

100 Gross Wooden Cases....25" x 16" x 13" deep

200 Gross Wooden Cases....25" x 20 1/2" x 20 1/2" deep

50 Gross Cartons...................16 1/8" x 11 1/2" x 9 1/2" deep

100 Gross Leverpak Drum

200 Gross Leverpak Drum

Today's standard case size is 70 Gross...21" x 12" x 12" deep

A gross = quantity of 144