Tennessee law prohibits a driver from consuming or possessing an alcoholic beverage in a vehicle if:
Unlike the open container rules of most states—which apply to drivers and passengers—Tennessee's open container restrictions apply only to the driver of the vehicle and only if the engine is running.
Alcoholic beverage. Tennessee defines "alcoholic beverage" to include every liquid containing alcohol capable of being consumed by a human being. This definition excludes certain patented medicines.
Areas of the vehicle. Tennessee's open container laws are intended to apply to the driver compartment of the vehicle. So, the open container restrictions aren't applicable to beverages possessed by a passenger or in a closed glove compartment, trunk, or other "nonpassenger area" of the vehicle.
An open container violation is a class C misdemeanor in Tennessee. A conviction will result in a fine of up to $100 but no jail time. Violators are usually given a citation instead of being detained but may be arrested if they refuse to accept the citation or if other circumstances exist that justify further detention. Tennessee will not suspend or revoke the driver's license of a violator, but an open container violation will increase the driver's license penalties related to a subsequent DUI (driving under the influence) conviction.