Easy to use: put the glass/cup down and press the bottom, the water spray will come out to clean. When cleaning is complete, remove the glass/cup and the spray will stop Quick Clean: From baby bottles to wine glasses to travel mugs, it easily cleans almost any drinkware so you spend less time soaking and scrubbing EASY INSTALLATION: Easily installs in holes on empty countertops, such as those used for soap dispensers and sink sprayers. DIY installation in 10 minutes STYLISH DESIGN: The sleek, versatile design allows the glass washer to seamlessly pair with any faucet in any room style. The cup holder is made of high-quality ABS , which is not easy to rust. Black finish resists stains and fingerprints Compatible Sizes: Minimum drinkware opening size is 1 inch in diameter and maximum drinkware opening size is 3.6 inches in diameter.