Final answer:
The legal requirement for transporting alcoholic beverages in a vehicle is that the container must be closed and sealed.
Step-by-step explanation:
The question pertains to the legal requirements for transporting alcoholic beverages in a vehicle. According to most state laws, an alcoholic container carried in a vehicle must be closed and sealed. This means that the container should have its original factory seal unbroken or, if previously opened, it must be securely closed to prevent spillage and consumption within the vehicle. Traveling with containers that are empty, completely full and open, or partially filled and not sealed typically violates open container laws.
To put this in the context of the reference information provided, it's important to understand that the material of the container (whether high-density polyethylene, steel, or glass) and the use of cork stoppers are less relevant than the legal status of the seal itself when transporting alcohol in a vehicle.