For the professional barista as well as any domestic user of a portafilter machine it is practical and efficient to use a sturdy and solid knock box for the swift and easy disposal of espresso grounds or so called pucks. The heavier the container, the easier it will be to knock out the espresso puck from the portafilter basket. Both the knock rod and the box should be well damped to absorb and minimize the impact on both portafilter and work surface and also to eliminate loud noises.