Diet Coke Great Britain is joining forces with cult celebrity jewellery designer Johnny Rocket, and the world’s best department store Selfridges, to bring the limited edition ‘Diet Coke Crystal Collection’ made with Swarovski Elements. In a fashion first, Diet Coke fans and fashionistas alike will be able to create their own bespoke crystal bottle in Johnny’s pop up workshop—‘the Diet Coke Crystal Customisation Boudoir’ at Selfridges’ London flagship store this October.