With this product, you really depends on flypaper. No matter how you look at it, it will cost about 13 on the Internet, - whether the goods including transport or separately.. These are about 30% of the price of all my razor incl. The essays. Those things are so unstable that you can buy two, if one does not simply want to switch to another razor. Sustainability is something else !!! If again the essay breaks then I'll buy another device and then search for more of these criteria.