The specially designed silicone SUDSKI is engineered to adhere to glossy surfaces, such as glass, mirror, marble, metal, glossy tiles, and laminate, utilizing an advanced patented technology. An advanced drainage system further enhances its unique features. Please note: this product should not be used on stone or other unglazed tiles. This product is ideal for smooth, glass-like surfaces and should not be used with glass bottles. Composed of 100 percent silicone, no suction cups or adhesives are needed for installation. Simple to use.