To increase brand preference at bars, repeat purchases of glass bottles and encourage a feeling of community around the brand, Coca Cola asked our agency to design a new mobile marketing promotion. The promotion invited friends to play together, thus increasing the total number of entries, through a very simple mechanic: by sending the pin-code they could find on all Coca Cola glass bottles, users could win one of the 400 packs of 3 SONY VAIO PCs through an instant win. The promotion was very successful, with more than 230.000 unique users and an average of 4 entries per user.