an improved plastic product that enables adjacent portions thereof to be easily folded into juxtaposed relationship . the product has at least one elongated hinge that extends between sides of the product in along the length and / or the width thereof . the hinge is formed by utilizing an angled or curved cutting tool to create a continuous slit which in a preferred configuration is generally l - shaped so that it extends from one surface of the product to a first location that is within the products &# 39 ; body and then extends therein from the first location to a second location also within the thickness of the body . the slit opens onto the one surface and thereby forms a flexible bridge integral with those portions of the product adjacent thereto , the bridge permitting such adjacent portions to be flexibly folded into juxtaposed relationship .