New Perfect Slice bakeware. A non-stick bakeware and custom slicing system in one. Perfect Slice is more than a quality baking pan – it's also a convenient cutting system. The unique patented guideline grid around the outer edges of every pan allows you to simply line up an exclusive Perfect Slice cutting tool, and press down to create any portion size desired so every slice is beautifully uniform. The cutting tool with a silicone handle is tough enough to cut the cake yet won't damage your pan. Not sure how it works as I never opened it. I bought it at Sam's Club about 6 years ago.