Dog Bone 4 inch Cookie Cutter is made from tin plated steel and is food grade certified. This cookie cutter has rolled edges on top making it safe and comfortable to handle. Decorate cookies for birthday parties, weddings, summer picnics, church or school functions and bake sales. Cookie Cutter Care; After using your cookie cutters, hand wash and towel dry them. Then place them on a clean cookie sheet in your oven as it cools down from baking. The heat will dry out any remaining water that you may have missed from towel drying. Metal cookie cutters are NOT Dishwasher Safe.