As well as being a massive promo for the DeLorean (a car which would've swiftly been forgotten about or deemed as a massive, metallic failure if not for this franchise), the 'Back to the Future' series plugs Nike on numerous occaisions. Check out the second one for some lingering close-ups of what the footwear will look like in the future. The films are also steeped in Pepsi and Pizza Hut promos.