Pee bottles, constant monitoring and blowing through stop signs: Amazon DSP drivers describe the job "Prime Day is here, and that means a lot of deliveries for Amazon’s army of 115,000 drivers who work for small businesses, called Delivery Service Partners. Amazon has been relying less and less on UPS and the U.S. Postal Service, building its own network of more than 2,000 independent contractors who then hire drivers for those dark blue Prime vans."