W&K, which is pitching for the business out of its New York and Shanghai offices, already has the flagship Coke brand. BBH joined the roster when it was awarded the creative assignment on Coca-Cola's Vitaminwater last month.
In the first nine months of 2008, Sprite was supported by $17 million of spending in US measured media, according to TNS Media Intelligence. However, its volume during that period dropped 5 per cent.