And 2004 looks unlikely to be any different, with the first new product of the year hitting US shelves and cooler cabinets this week. Diet Coke with Lime is being rolled out throughout the US - with the rest of the world to follow later - and follows earlier cherry, lemon and vanilla variants of the iconic cola brand. "Consumer research indicated a preference for lime as the next Diet Coke flavour, as it's a flavour combination many people already are enjoying," said Ed Klein, vice president for Diet Coke at Coca-Cola North America.