Made of flexible, durable silicone, it has thousands of tiny fingers that loosen and clean stuck-on grime. Bacteria and mildew resistant, Sponge is non-abrasive and gentle so it never scratches while it bends and flexes to get deep inside glasses and corners. Easily rinses clean and is also dishwasher safe. Features a built-in suction cup so it can hang it in your sink for quick drying. Versatile design can also be used as a heat-resistant pot holder; non-slip grip to open stubborn lids; and pet hair cleaner for upholstery. Silicone. Largest is 5 3/4"Sq.