About This Coffee Knock Box: This simple and elegant knock box is made of solid stainless steel and rubber, can be used for a long lasting time. It provides a designated space for the disposal of coffee grounds, preventing spills and contributing to a cleaner workspace. Mitigates Noise Design: Coffee bins with silicone bar on top is perfect for knocking portafilter filter grinds efficiently, There are 4 rubber feet on the bottom, anti-slide and protecting the surface, easy to hold and minimizes the noise for quiet operation. Mitigates Noise Design: Coffee bins with silicone bar on top is perfect for knocking portafilter filter grinds efficiently, There are 4 rubber feet on the bottom, anti-slide and protecting the surface, easy to hold and minimizes the noise for quiet operation. Easy to Clean: Square coffee knock box is essential coffee machine accessories, the knock box inside is very easy to clean, take few minutes to just lift the bar and the tray comes away completely, then empty and clean in the sink or dishwasher. Ideal Gift Choice: Coffee knock bin would also make a very well received gift for any coffee enthusiast with an espresso machine. Keep the kitchen counter looking clean and tidy and save your time.