【Premium Material】The coffee filter holder knock box is made of excellent ABS plastic material with smooth edges, easy to use and durable. 【Easy to Use】Our knock box allows you to clean your filter holder quickly and easily. The right barista accessory is an important companion for a perfect espresso. 【Easy to Clean】The filter holder knocker is easy to separate from the container and clean separately in the dishwasher or simply by rinsing. 【Noiseless Design】The ingenious knock bar of our coffee grounds tea box also ensures absolutely silent use next to your espresso machine