It's bad to spill a drink inside a car.
Roy is getting a ride from his friend, and they stop at Mcdonald's to get a bite to eat.
Roy wants to take his drink with him.
Roy gets a top for the cup before he takes it with him into the car.
Roy brings his drink along him without a cap.
Roy's friend enjoys spending time with him during the ride.
The drink spills in Roy's friend's car which makes him upset.