We have an  Arnoldware Freezer container 1 1/2 pt Vintage item.  I do not have the cover for it.  There is a "stain" inside, most of it came off with water (it's much lighter than the photo now) the balance may come off with a chemical cleaner.  It is a green/turquoise color and measures about 4 1/4" in h x about 3 3/8" square on the bottom and about 3 7/8" square on the top.  It is plastic with retro lines decorating the sides.  It is marked on the bottom.