Jamie Oliver Chop & Shaker from Tefal has a knife blade made of stainless steel which makes it perfect for chopping hard ingredients such as nuts and carrots. Put the ingredients in the container and close the spill-proof lid, then pull on the string to chop the contents. Chop & Chaker is perfect if you want to chop onions without shedding a tear or making a salsa, pesto or why not a dressing.