About this item Fast Coffee Ground Disposal – Our coffee knock box lets you quickly dispose of used espresso pucks. Large capacity stores grounds before transferring to compost Perfect Size & Capacity – Compact design fits under most machines. The knock box and other espresso knock box models hold enough grounds to minimize frequent emptying High Quality & Safe – Durable ABS and rubber bar protect your portafilter. This espresso puck knock box will not spills and scratches, ensuring your coffee tools stay protected Detachable Knock Bar – Removable rubber bar on this espresso knock box and tamp station allows easy cleaning and hassle-free maintenance Stable & Non-Noise – Non-slip base of this espresso grounds knock box ensures stability, without noise, and will not sliding or scratching kitchen counters