Luke and Carrie are driving down a straight section of the interstate at 60 mph in Luke's new convertible Carrie is drinking a soda in the passenger seat When she is done she tosses the bottle out?

the bottle will land on the interstate behind the car

Added: And if the act is witnessed by law enforcement she and/or Luke will be charged with "littering" - "throwing missiles" - "depositing trash on the roadway" - or some similiarly Worded charge.