As some of you may recall, there was a contest a short while ago where fans could design an art piece of Hatsune Miku to be featured on Coca Cola machines in Japan. The winner was awarded with a year supply of Coke, along with other goodies.
The winning art has finally been spotted in use within Japan on cola machines. Machines marked with the artwork and the Project Diva Arcade logo also have a chance of dispensing a can with a collectable strap/keychain. Each can costs 120 Yen, or roughly $1.50 USD. Cans containing one of the straps will have it held in place at the top under some protective plastic. You can obtain 4 different Crypton characters, including Miku, Len, Rin, and Luka.
Thank you to SeyrenLK for the info!