A method and apparatus is disclosed that documents and authenticates cap
removal data. According to a first aspect of the present invention, the
apparatus measures a parameter indicative of the number of times that a
cap has been removed by a user. The apparatus also encodes at least the
parameter indicative of the cap removal data, thereby deriving encoded
cap removal data. The apparatus outputs the encoded cap removal data to a
user. According to a second aspect of the present invention, another
apparatus receives the encoded cap removal data and decodes it to
authenticate the cap removal data. According to a third aspect of the
present invention, a medicine container is operable to output a result of
a game based on cap removal data associated with the medicine container.