Plastic Food Liner Insert for the Classic Cardboard Cars & Trucks. Or, put candy, cookies, plants, or flowers, anything you want that you think would be better served using a plastic liner insert to preserve the centerpiece car & have a more sanitary way to serve unwrapped food items. The inserts are made of a lightweight plastic that is approved for food use. They measure 4" x 4" x 2 3/4" making them a fit for the cardboard car opening. Typically, they would be served with a hamburger and fries but spaghetti works, too! Create your own fun food to put in them. Candy, cookies, ice cream, so much fun! You then, will have the cars to give away as a party favor, door prizes, etc. We sell them in any quantity you want at only 30 cents each. They are not fold-down, they come nested, but ready to put in the car or truck as they are.