Lighter than air

I remember looking at the work of Brazil's Agencia Click with students at RMIT last year.

One of their ads that we all loved was a banner for Coca Cola Light, where the air in the top of the bottle remained at the top when the bottle was turned upside down.

I wonder if the team at BBDO in Dusseldorf have ever seen that Coke Light banner?

Judging by this truck livery it certainly looks like they might have.