Brand New in factory packaging! For use with PowerPop microwave multi-popper. Combines with PowerBase to focus microwave energy so effectively that virtually every popcorn kernel pops. 1 package contains 8 Power Cup Concentrators! Sale includes 6 packs of 8 (48 cups!) Patented "target" design concentrates microwaves for maximum popcorn popping performance! Original Presto part number 09964. For use with Presto Power Pop microwave multipopper PowerBase also called Power Base