While we're on the bus topic, here are a few images.
I'll respond to the Pepsi truck with a Coca Cola truck at a later date
First, the ideal school bus:
In the real world, not every school bus was as pretty as the ad. Wonder what it was like to ride waaaay back of the rear axle?
Okay, okay... I know it's a GAZ, but it's sure a nice looking bus (especially the faired cowl):