Check out this pioneering beverage and snack tray for cars, featured in the November 1950 issue of Popular Mechanics.
Travel snacks can be enjoyed while the car is in motion with a dashboard tray which prevents cold drinks or water glasses from tipping over. The tray hangs from two cords which are held on the dashboard by suction cups. Bottles or glasses rest on two disks which are suspended below the tray on chains. When not in use, the tray can be folded into small space for storage in the glove compartment.
It's a good thing they didn't have Big Gulps or Super-Size Me's back then.