An often overlooked way to differentiate a product is genuine packaging innovation or delivery system innovation. The best new packaging differences, of course create both compelling differences and are patentable.
One such example of a new package that should be compelling is the new Giro Gratta package for cheese. It contains 8.9 ounces of Grano Padano cheese, a close imported cousin to Parmesan. When you turn it, freshly grated cheese comes out. It can be purchased from $4.99 to $11.99 depending on the retailer. I have only seen it in New York.
Apparently this idea was not patentable because Kraft has introduced their own version, Kraft Grate-It-Fresh Parmesan at $4.99 for 7 ounces.
Both products are disposable, non-reusable packages.