The Coffee Knock Box is a small, simple and elegant container that allows you to literally knock the used portafilter full of coffee grounds directly into it. Widely used at home, cafe shop, canteen, restaurants, bars and more Product Information Material: ABS + Rubber Color: Black Coffee Knock Box Mouth Diameter:12.2cm/4.8in Coffee Knock Box Bottom Diameter: 10cm/3.9in Coffee Knock Box Height: 12.7cm/5in Rubber Bar Length: 14.5cm/5.7in Weight:350g/14.1oz Package Include 1 x Coffee Knock Box 1 x Rubber Bar Convenient Design The convenient and elegant design of the Coffee Knock Box makes the process of using the Knock Box easy. The barrel body is made of special ABS, which is enough to ensure the Coffee Knock Box is strong and durable. Plastic bodies are also able to reduce the noise when using. And it is able to ensure no more spilling when knocking out the coffee grounds with a rubber bar. No More Waste Coffee grounds often turn into garbage, because people simply don’t know there is another option. Failure to handle them properly may cause harm to the environment. The knock box allows you to easily store the remaining coffee grounds until the bucket is full. At this point, you can recycle these coffee grounds and turn them into rich fertilizer. Easy Clean-Up In addition to emptying and flushing it, it hardly needs any maintenance. By tapping the bottom of the box with a metal bar, you can easily empty the coffee grounds. And because the coffee knock box uses a special ABS material, it only needs to be rinsed with water, and the coffee knock box will become very clean.