To make the raspberry layer, purée raspberries, Prosecco, Sparkling Ice Grape Raspberry, and sugar in a blender until very smooth. Fill each popsicle mold ½ full with raspberry mixture. Freeze while you make the peach purée.
To make the peach layer, purée peaches, Prosecco, Sparkling Ice Peach Nectarine, and sugar in a blender until very smooth. Pour peach mixture over raspberry mixture to fill molds. Freeze until firm, at least 2 hours.