KNOCDIC Curve Square high-capacity espresso knock box in matte white with a contrasting charcoal grey interior lining and real oak bar.
Emptying a spent coffee puck from an espresso portafilter into a large sculpted white and black square knock box.
A pastel yellow curved square coffee knock box styled neatly alongside a high-end home espresso machine grinder setup.
Size guide and capacity infographic detailing the large scale storage of the Curve Square coffee waste container.
Product design feature breakdown graphic showing the natural oak bar, non-slip base, and curved edge finish of a large coffee bin.
Color options chart displaying 27 custom matte, metallic, galaxy, and marble colors for the KNOCDIC knock box and espresso machine accessories collection.

COFFEE KNOCK BOX

The Curve Square Espresso Knock Box with Oak Bar

£52.29 GBP
16 cm width
Holds 20–22 pucks
Real oak knock bar
Product Description

Where high-volume capacity meets fluid, modern architecture. The Curve Square Espresso Knock Box features a generously scaled interior wrapped in softly rounded, sculpted contours—perfect for heavy espresso routines, multi-coffee households, and busy home coffee bars.

  • ✓ High-Volume 22-Puck Capacity: Deep interior compartment securely contains 20–22 spent espresso pucks, eliminating the need for frequent trips to the main kitchen bin.

  • ✓ Softly Rounded Square Profile: Combines the space-saving utility of a square frame that sits flush in corners with elegant, curved edges that soften your espresso bar's aesthetic.

  • ✓ Forward-Positioned Oak Bar: Ergonomically set forward to create an expanded clearance zone at the rear of the bin, allowing used pucks to fall cleanly without messy splattering.

  • ✓ Premium Removable Liner: Features an integrated inner box liner that slides out completely, making clean-up, rinsing, and disposal incredibly quick and effortless.

  • ✓ Dual-Tone Customization: Individually crafted to order in the UK with the ability to pair your favorite outer chassis shade with a contrasting inner lining across 27 signature colours.

Size & Specifications

  • Capacity: Holds approximately 20–22 standard used espresso pucks

  • Craftsmanship: Precision engineered with a refined, smooth matte body and natural hardwood grain details.

Materials & Care

  • Body & Inner Lining: Premium plant-based, eco-conscious PLA
  • Knock Bar: Genuine Solid Oak Hardwood
  • Care Instructions: Hand wash only with cool or lukewarm water. Simply remove the inner sleeve to rinse. Wipe clean with a soft cloth and dry thoroughly.

  • ⚠️ Do not place in the dishwasher, microwave, or expose to high-heat sources.

729 possible colour combinations
✔ Made to order in 1–4 business days
Free UK shipping

Pairs well with

Cleaner Coffee Corners

Keep your space tidy with less mess and fuss.

Solid Oak Knock Bar

Real oak adds a natural, premium finish to your daily coffee setup.

Built to Last

Durable, impact-resistant and made for daily use.

Loved by Home Baristas

Designed in the UK for the home espresso community.

Why choose Square?

High-capacity design

Holds up to 20–22 pucks, perfect for multiple espressos, guests or busy mornings.

Square knock box in a coffee setup

Tidy workflow

Designed for quick, clean knocking without cluttering your setup.

Portafilter knocking coffee puck into a rectangular knock box

Custom colour pairings

729 colour combinations to match your machine, space and style.

A note on 3D printing

Each KNOCDIC® knock box is 3D printed in small batches. Subtle layer lines may be visible — this is a natural part of the process and a mark of its origin.

Why we 3D print our products →

Materials & care

Body: Premium plant-based PLA

Knock bar: Solid real oak wood

Hand wash only; avoid dishwasher and high heat.

Complete your coffee corner

KNOCDIC metallic black espresso WDT tool resting inside its custom integrated magnetic docking holder.

Magnetic WDT Tool

Improve extraction with even distribution

From £15.29
Espresso Puck Screen and Walnut Holder Set - Knocdic

Puck Screen Set

Cleaner extractions with less mess

From £18.99
KNOCDIC Espresso Workflow Upgrade Kit with portafilter holder, WDT tool and puck screen

Portafilter Holder

Keep your portafilter tidy and close by

From £18.99
KNOCDIC Clean Coffee Station Kit with knock box, brush set and coffee cloth

Cleaning Brush

Sweep away coffee grounds in seconds

From £15.99

FAQs

How many coffee pucks can the square knock box hold?

The square knock box holds approximately 20–22 espresso pucks, making it ideal for busy home coffee setups, multiple drinks, or shared households.

Which knock box should I choose?

Choose Rectangular if you need a slim knock box for narrow spaces. Choose Square if you want more capacity and a larger opening for busier coffee routines.

Which inner colour is best?

For everyday use, we usually recommend a darker inner colour such as Matte Black, Charcoal, or Ash Grey, as coffee marks are less visible.

Is the inner box removable?

Yes. The square design includes a removable inner box, making it easier to empty, clean, and maintain after daily use.

Is the oak knock bar removable?

Yes, the knock bar is designed to be removable, making the knock box easier to clean and maintain.

How do I clean the knock box?

Simply empty the used coffee pucks and wipe the box with a damp cloth. Please avoid putting it in the dishwasher, as high heat may affect the 3D printed material.

What material is it made from?

The knock box is 3D printed using durable PLA-based material and finished with a real oak knock bar. Slight layer lines are part of the 3D printed finish.

Is it heavy enough to stay in place?

Yes, it is designed to feel stable during daily use while still being lightweight enough to move, empty, and clean easily