For example, Kit Kat Japan won a Cannes Media Grand Prix award in 2009 for creating a candy-box-post-card sold in Japanese post-offices. I believe the idea was

For example, Kit Kat Japan won a Cannes Media Grand Prix award in 2009 for creating a candy-box-post-card sold in Japanese post-offices. I believe the idea was to enable a convenient way to send a gift during Japan's gift-giving seasons.