what is this?

Maybe a little too much to tell anyone, but every once in awhile I drive home from my daughter's house with an open container.
It's 1.5 miles of little backstreet 25 mile an hour speed limit.
If need be I can stand an open can up in that vent and close the door.
My windows are tinted too dark to be seen doing it also.
Normally, I open it about a quarter inch and it gives a nice cool breeze right down in the shoes.
Ahhhhh