Giovanni+Draftfcb are brilliant, and I do hope they bring these ads to Cannes and hand them out. For Nivea, they made a solar-power ad, so once you use your Nivea suncream, and the Nivea solar charging ad for your phone, you have no reason at all to go inside again. Smart! They should sell little sun-chargers like these, branded Nivea, right next to the bottle of SPF 50.
If Giovanni+Draftfcb aren't handing these out in Cannes to the judges right now, they are doing themselves a disservice. EVERYONE in Cannes needs to charge their phones constantly. You'll be the talk of the town, no matter what you may win.