So THAT'S what those are for.

[AlanCasida]

Always wondered. 

[e philpott]

if you need any of those things , I hear Farm truck from 405 has a bunch of them ..lol

[57 lima bean]

Excellent...........

[cjshaker]

We've come a long way since window trays.

[jayb]

There ought to be an indent in the top for a cupholder.  Back in the late '70s when I first got my GT-500 convertible I used to park it in the Burger King parking lot during cruise nights, and eat my hamburger while sitting on top of the roll bar, with my feet on the top of the windshield.  Of course, the car wasn't worth anything then...