were made from clay. They were converted into paper format (
menko) during the
Meiji period. The game of milk caps possibly originated in Maui,
Hawaii, during the 1920s or 1930s; it may also have origins in
Menko, a Japanese card game very similar to milk caps, which has been in existence since the 17th century, during the
Edo period. The game of milk caps was played on the Hawaiian island of
Maui as early as 1927. There are cap collectors that have caps dating back to the 1940s and 1950s. After new packaging made cardboard milk caps obsolete in the 1950s, manufacturers such as Haleakala Dairy and Orchards Hawaii occasionally distributed the caps as promotional items. In 1991, Haleakala expanded to the more populated
Oʻahu island, which led to a revival of the game. With this revival, the Pog name began being used generically for the game. Milk caps returned to popularity when the World Pog Federation and the Canada Games Company reintroduced them under the Pog brand name in the 1990s. The Pog
fad soared, and peaked in the mid-1990s. Pogs were being handed out for opening bank accounts and in McDonald's Happy Meals. The term Pog was claimed as trademark by the World Pog Federation while other companies claimed it was a generic term as it was selected by the children that played the game. In October 1994, a lawsuit was settled between World Pog and Universal Pogs Association. Pog was recognized as World Pog's exclusive term and Universal Pogs changed its name to Universal Slammers, Inc. Milk caps proved to be major distractions from classes and the source of various playground arguments. These elements eventually led to the banning of milk caps from various schools across North America. Other bannings occurred across Australia and Sweden. == Equipment ==