Super HK topes are made of quality FOOD GRADE STEEL which is extremely hygienic, rust proof, durable, unbreakable and looks elegant with its steel-mirror finishing. You can preserve your food for longer since the food grade is made of non-toxic material without BPA or any other harmful material. Steel provides light weight and makes it even easy to clean. The Tope is very easy to clean as it is made from stainless steel. Either you wash them yourself or drop them in the dishwasher, they will come out looking clean and new every time.