Since the public transportation industry runs on very tight margins, we need to explore ways to make our system affordable. One idea we are pursuing is the concept of 3D advertising. Since the air vents can be 3D printed, it is easy to make them as custom designed shapes to represent clients’ products or ambient artwork. Here you see ViruBustor’s VD, Kerstin Mühlig, with a mockup-of of how a vent advertising our colleagues PBZ car tuning could look.