Civil War Period plastic or “hard rubber” (Goodyear) Covered Glass Liquor Flask Marked Goodyear 1865 . A Civil War Officer’s best friend. High quality glass flask with early natural Goodyear plastic screw top and covered in orange plastic. Has a matching hard rubber shot cup. A great flask from the Civil War period to later 19th century. Extremely rare early form of Goodyear plastic made from natural hard rubber material. Excellent condition with small crack in cup . 100% guaranteed to be authentic 1865 19th century. These were made during and after the Civil War so it is impossible to completely date them Gettysburg Museum certified, museum COA provided. Also note when browsing our web site there are several pages of items, at the bottom of the list look for other page numbers.