A knock box collects used coffee grounds; empty and clean it regularly.

Black 11 cm Knock Box: Compact Coffee Puck Disposal | Barista Essentials

Short on space next to your espresso machine? This black 11 cm knock box provides a dedicated place for used coffee pucks. Geert-Jan de Baristaman helps you assess whether its size suits your countertop and cleanup routine. Use it after brewing; it does not change your espresso extraction. Order from Barista Essentials, which handles payment, shipping and returns.

Collect used coffee pucks next to your machine
11 cm diameter for a compact coffee corner
Rubber sleeve cushions the impact on the knock bar

€34,95

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You order from Barista Essentials, which handles payment, shipping, returns and the right of withdrawal under its current terms. Geert-Jan de Baristaman may earn a commission; you pay nothing extra.

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Key specifications

Brand
Barista Essentials
Product type
Round knock box
Size / Content
Round knock box
Suitable for
A standalone accessory for collecting used espresso pucks, with no machine-specific connection. Check the available countertop space and the movement of your portafilter. It is not designed to be attached to the espresso machine.
Material / finish
Stainless-steel frame and knock bar; rubber sleeve; non-slip base
Cleaning / Maintenance
Empty the box regularly. The supplier recommends removing the bar occasionally for cleaning. Remove coffee residue, clean gently with a soft cloth and let the components dry before putting them back. Dishwasher suitability has not been confirmed; do not assume it is dishwasher-safe.
Colour
Matte black
Package contents
One round 11 cm black knock box with a knock bar and rubber sleeve. A portafilter, coffee beans or other accessories shown in lifestyle images are not included.

Why this helps make better coffee

After brewing, the compressed ground coffee remains in the filter basket. This is called a coffee puck. If you walk to the bin after every shot, crumbs and drips can land on the countertop along the way. A dedicated collection spot beside your machine mainly makes cleanup easier; the box does not improve extraction.

This round black knock box collects the coffee puck when you gently tap the portafilter against its coated bar. The stainless steel body has a non-slip base, while the stainless steel bar has a rubber sleeve. The 11 cm diameter version is intended for a small workspace where the box is emptied regularly. The colour affects its appearance, not how it works.

A dedicated place for coffee grounds and fewer trips during your coffee routine.

Ronde zwart uitklopbak met beklede stang, gezien vanaf de voorkant

Who is this suitable for?

For a small coffee corner and home baristas who tidy up after making a few espressos. Choose the 11 cm version if saving space matters more than collecting many pucks. Also measure whether you have enough room beside the machine to move your portafilter freely.

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For whom is this not necessary?

Not needed if you can already empty your portafilter over the bin easily and without spilling. If you have very little free countertop space and a separate coffee grinder, a suitable knockout drawer may offer another layout. For filter coffee without a portafilter, a knock box is generally not a sensible first purchase.

Does this fit your machine, routine or use?

Compatibility
You do not connect the knock box to the espresso machine. Use it to empty a portafilter after brewing espresso. Check that you can move the portafilter above the box without hitting the outer rim. A brand name or filter-basket diameter does not guarantee comfortable use in your coffee corner.
Size
11 cm diameter; supplier estimates capacity at least 10 coffee pucks
Machines and painters
Next to a semi-automatic espresso machine with a portafilter
Specifications
Next to a semi-automatic espresso machine with a portafilter

Privé barista coaching aan huis door Geert-Jan van der Molen, waarbij espresso technieken worden uitgelegd en geproefd tijdens een persoonlijke koffie training.

Advice from Geert-Jan the Barista Man

With over 10 years of experience in providing barista workshops at home, at businesses, and in Amsterdam, Geert-Jan is happy to share his advice.

Who is Geert-Jan?

From practice:

At De Barista Shop, Geert-Jan de Baristaman helps you choose tools based on the task you want to simplify. With a knock box, the aim is a practical cleanup spot. Its size should suit your countertop and how often you empty it; a larger accessory will not improve your coffee on its own.

My advice:

The 11 cm version makes sense if you want to start small and have limited free space. Keep it within reach and the surrounding area clean. If the puck remains very wet or falls apart, also review your recipe and filter basket; do not keep hitting harder to compensate.

Hand houdt een portafilter boven de beklede stang van een zwart uitklopbak

Here's how to use this in your coffee routine

A barista tool only really works well when you know where it fits into your routine.

Get into the routine:

After brewing espresso, before dosing your next portion of coffee.

Usage:

After brewing espresso, before dosing your next portion of coffee.

Geert-Jan's tip:

Make emptying the knock box part of your cleanup at the end of each coffee session. Keep the cloth used for your portafilter separate from the one used for the steam wand. Do not leave a full box on the counter for days, even if its stated capacity suggests another puck might fit.

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Note:

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Common mistake

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Understand what still needs attention after cleanup

An empty knock box is a good start. To keep your machine clean, it also helps to know where coffee oils and other residue build up.

Online barista module espressomachine reinigen en onderhoud stappenplan

Learn which maintenance routines your machine and grinder need beyond disposing of coffee pucks.

Cleaning and maintenance – Protect the taste and your espresso machine

€4,95

Review this module

Online barista module drie gouden regels voor goede espresso zetten

Learn to dial in extraction once your workspace and maintenance routine are in order.

The 3 Golden Rules of Espresso – Why Your Shots Keep Changing (and How to Stop It)

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Review this module

Frequently Asked Questions

Where can I order the black 11 cm knock box?

The button links to the corresponding version at Barista Essentials. You complete your purchase there, and that store handles payment, delivery, returns and any applicable right of withdrawal under its current terms. Check the latest price and availability there too.

Do I pay extra through the affiliate link?

No. Geert-Jan de Baristaman may earn a commission when you order through the link; you pay nothing extra. Your purchase is handled by Barista Essentials.

How do I choose between 11 and 14 cm?

The 11 cm version takes up less space; the 14 cm version offers more collection capacity. The supplier estimates at least 10 and 18 pucks respectively. Actual capacity depends on your coffee pucks. Choose based on available space and use, and empty both sizes regularly.

Will this knock box work with my espresso machine?

No connection to your machine is needed. What matters is having enough space to hold the portafilter over the box and tap it gently against the bar. Check that movement on your countertop. This accessory does not replace a filter basket, cleaning products or machine maintenance.

When do I not need a knock box?

If you can already dispose of used coffee neatly and easily over your bin, a separate knock box mainly adds another cleanup spot. If you have flavour problems, improve your beans, recipe and maintenance first. A knock box helps with waste, not with dialing in espresso.

I have another question

You can always contact Geert-Jan de Baristaman

Will 11 cm fit your cleanup area?

View the black 11 cm version at Barista Essentials

You order from Barista Essentials. Check current prices, availability, delivery and returns policies there.

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Black 11 cm Knock Box: Compact Coffee Puck Disposal | Barista Essentials