In a mixing bowl, measure 6 conical cups of Cocoa Puff Cereal. Add 4 ounces of melted chocolate. Mix well. Fill up each cone with the mixture. Let cool in the refrigerator until set. Remove from the refrigerator.
To make the cup, use acetate film. Cut a 3 by 3-inch square. Form a 2 1/2-inch diameter ring, 1-inch tall and secure it with a Post Flag for easier removal. Brush the square base with chocolate. Place the ring on the square and let it set. Brush the inside with chocolate, let set and add a second layer of chcocolate. Fill each chocolate cup with a sponge cake disk oversoaked with the Rum syrup. Mix chocolate, peanut butter and whipped cream together and fill up the cup. Level the top using the spatula. Remove the acetate. Remove the paper cup from the puff cone and set the cone on top of the chocolate cup.