In most U.S. states, it is illegal for someone to consume alcohol and then operate a motor vehicle, and it is also illegal for anyone in the vehicle to have an open container of alcohol. Connecticut is one of the few states where the laws on open containers differ, and this can lead to confusion for drivers, especially those from out of state. Failure to understand Connecticut law can lead to being arrested for driving under the influence, and this is obviously an outcome that most people want to avoid.
No Real Open Container Law
As of this writing, 40 U.S. states have laws prohibiting open containers of alcohol in vehicles. Connecticut, however, is not one of them - in most situations, passengers who are over the legal drinking age of 21 are permitted to have alcohol in a vehicle and even drink from the open container. Connecticut law prohibits consumption of alcohol “while operating a motor vehicle” - but if one is not operating the vehicle, the law is lax. Some local ordinances do ban open containers entirely, but state law does not.
There may be consequences for drivers who are under 21 whose passengers drink alcohol in the car, but these would stem from their age, rather than any consumption. A police officer can charge an underage driver with a violation if there is alcohol in their car if they believe the driver knew or had reason to know of its presence, which can lead to a license suspension. However, this can be difficult to prove, depending on the specific facts of the case....