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1.
Place the knock box on a stable, flat surface.
Remove the portafilter from the espresso machine.
2.
Hold the portafilter over the knock box and knock out the coffee puck using a firm, controlled strike.
(You can knock using the portafilter neck or head.)
3.
Done.
The portafilter should now be empty. If needed, repeat step 2.
Important usage notes
Do not place the knock box on hot surfaces (e.g. stovetops) and do not use it in a microwave or oven.
⚠️ Fire and damage hazard.Never knock on a wet or damp surface.
Moisture can weaken the cork structure.Especially at the beginning, it’s recommended to hold the knock box lightly with your free hand until you’re familiar with the technique.
⚠️ Hot coffee grounds may cause burns.Cork is a durable natural material and holds up well in daily use.
However, excessive force or improper technique can damage any material.
Cleaning & care
Empty the knock box regularly to avoid odors or mold.
Simply rinse with water to clean.
No loose parts, no assembly required.Optional: Lightly spray the inside with a food-safe disinfectant after cleaning and let it dry completely.
Sustainability
Used coffee grounds can be reused in many ways, for example:
as plant fertilizer
for odor absorption
in DIY cosmetics or cleaning solutions
