Knock yourself out! The Pisa Knock box is made from recycled stainless steel, polished to a mirror finish. It stands firmly on a die cast tamping mat. The tamping mat is made from food safe silicone and effectively muffles the knocking sound. The top is removable to make emptying easy. The inner sides of the container are coated black to hide stains. The Pisa is simply more stylish and a little smarter.