ferrero, the world&rsquos largest chocolate producer as well as the world&rsquos biggest buyer of hazelnuts for its delicious nutella spread, has devised a cool way to use all of those hazelnut shells laying around.the waste shells could be composted, of course, but more practically, the italian company is planning to use the shells&rsquo natural wrapping to create packaging for its chocolates.ferrero has teamed up with renewable packaging company stora enso, and pts, a german foundation that researches and consults on fiberbased product development, to develop socalled ecopaper