I'm going to describe them as badly as I can.
Imagine an outdoor table. Those plstic ones. With the four pop on legs, that you saw at every outdoor gathering in the 90s, with the seats that stacked on top of each other.
Anyway, those plastic tables. shrunk down to fit inside a pizza box, placed in the middle of the pizza, to stop the box crushing down onto the topping, and the topping getting stuck to the pizza box lid.
Ohhhhhh yeah ok! I vaguely recall..well, again, we get by without such things.