COOKING UTENSIL OR ACCESSORY, NAMELY, TWO OR MORE PIECES OF PLASTIC IN THE SHAPE OF BOOKENDS, OR THREE PIECES OF PLASTIC IN THE SHAPE OF TRIANGLE-SHAPED BOOKENDS, FOR USE IN HOLDING OR POSITIONING HORIZONTAL OR FLAT LYING FOODS SUCH AS SANDWICHES OR PIZZA IN A VERTICAL OR UPRIGHT POSITION FOR MORE EFFECTIVE COOKING INSIDE MIRCOWAVE OVENS