The best thing ever to happen to Diet Coke is back for round two. In 2010 some genius at 'coke HQ' came up with the idea that ladies like nail polish... what better way to get ladies what like polish to also like Diet Coke? Give them free polish! The colours this year were fab (and possibly my most used of 2010) so next year they've pushed out all the stops to make them even better. These great colours launch in store on January 12th and are free when you buy two bottles - that's a free Nails Inc polish worth over a tenner for the cost of a couple of cold beverages. Game, set and match to Diet Coke.