Karl Lagerfeld is one of Diet Coke's biggest fans. The designer has been rumoured to only drink the soft beverage so it's not surprising that he was asked to design a bottle for the brand. FabSugar US already revealed the ad campaign starring Coco Rocha and Baptiste Giacobini where they pose in Chanel. Now, the limited edition box set has been unveiled with an aluminum bottle featuring Karl's famous silhouette. The box set (60 euros/about £52) also includes a bottle opener in a secret drawer. What do you think of this latest collaboration?