In order to get the best from your porta-filter setup, there’s one device that’s particularly important. The knock-box, as it’s known, is a small receptacle built to hold all of the spent grounds that are left over in your filter after you’re done brewing your espresso. Simply knock the filter against the bar, and the ‘puck’ of squashed-up grounds will spill out neatly into the bucket. What could be simpler?
A good knock-box should be great to look at. More than that, it should be able to withstand all of the bruising that might be inflicted on it over the years. This example is rugged enough to last the distance. It’s also easy cleaned and maintained; If you’re looking for a convenient and attractive knock-box for your setup, then look no further!