Can a passenger in car drink?

It depends on the laws of the jurisdiction and the passenger's age. While it's not illegal for a passenger of legal drinking age to drink alcohol in a car in most places, it can be illegal depending on local open container laws. These laws often prohibit having open containers of alcohol in a vehicle, regardless of whether the passenger is drinking or not. Therefore, even if a passenger is of legal drinking age, they might still face legal consequences for drinking in a car depending on the specific laws where they are.