Applicable StatesThe 39 states in compliance with TEA-21

Drinking alcohol isn't just illegal when your car is in movement. If your car happens to be parked where there are more than 10 cars, located on any public highway, or still has the keys in the ignition, you are subject to a fine. In short, your Maxima can't double as a pub. The beer may cost more at your local bar, but they also won't hit you with a ticket for taking a few back. The cost-benefit ratio seems clear.