COFFEE MUST-HAVE: Improve efficiency and tidiness while making coffee at home, at a cafe, or at a restaurant bar. The coffee knock box by Navaris is the perfect accessory for hobby and professional baristas. EASY TO CLEAN: The stainless steel container and outer wooden box can be taken apart for easy cleaning. Please note that this item is NOT dishwasher safe. We recommend washing by hand. SOLID QUALITY: The outside of the espresso knock box is made of real wood, which makes it stable during use. Countertop accessories don't get any better than this. LARGE CAPACITY: The knock box is capable of catching a large amount of used grounds before it needs to be emptied. HOW TO USE: Knock out coffee grounds from the portafilter by tapping it firmly against the padded rod. The rod is placed closer to the front so grounds have space to fall freely into the container.