The Cafelat Tubbi Knockbox for Espresso Pucks

If you pull shots at home, you’ve probably dealt with the messy business of knocking out espresso pucks. The clatter, the stickiness, the lingering grinds—it’s one of those small but frequent frustrations. What you need isn’t a fancy machine or a complicated routine. Just a solid, simple way to get those pucks out of your portafilter without the noise or the mess.

The Cafelat Tubbi knockbox is a compact, 270g solution built to last. Its design—just a plastic tub and a reinforced rubber bar—makes ejecting espresso pucks quick, quiet, and clean. No assembly. No loose parts. Just consistent performance.

What Is the Cafelat Tubbi Knockbox?

The Tubbi knockbox is a small, streamlined accessory designed for home baristas to dispose of espresso pucks efficiently. It consists of a single-piece ABS plastic tub and a durable rubber knock bar—no screws, no bolts, no complicated setup. The only additional component is a stainless steel reinforcement inside the rubber bar, adding strength without extra weight.

Its minimalist construction is intentional. The idea was to create a tool that does one job well: absorbing the impact of a portafilter being knocked against it so that pucks drop out cleanly, without damage to your equipment or your kitchen.

How the Tubbi Knockbox Works

The Tubbi knockbox uses a straightforward mechanism. You insert the portafilter into the tub and knock it against the rubber bar. This action dislodges the espresso puck into the plastic container. The rubber bar, which is food-safe and reinforced with stainless steel, absorbs much of the shock, reducing both noise and wear on your portafilter.

The interior plastic is slightly flexible, which helps dampen the impact further. The base includes a non-slip rubber pad that keeps the knockbox steady during use and also contributes to noise reduction. Emptying is simple: just lift out the rubber bar and discard the pucks as desired.

Design and Build Details

Here’s what makes the Tubbi knockbox stand out:

• Materials: ABS plastic body, food-safe rubber knock bar, stainless steel reinforcement
• Weight: 270g
• Capacity: Holds around 15 double espresso pucks before needing to be emptied
• Height (including base): 13cm
• Colour: Matt black
• Dishwasher safety: The plastic tub is dishwasher safe, though a rinse with mild detergent is typically sufficient
• Base: Non-slip rubber pad to prevent sliding and reduce noise

The product comes as a single complete unit, ready to use right out of the box. Only one colour option, matt black, is currently available.

Why It Matters for Home Baristas

For anyone pulling regular espresso shots at home, the knockbox is more than a convenience—it’s a small but meaningful upgrade. The repeated action of knocking out pucks can wear down your portafilter, create unwanted noise, and lead to messy counters. The Tubbi knockbox addresses all three issues effectively.

Its compact size means it doesn’t take up much space on your countertop, while its 15-puck capacity means you won’t be emptying it after every shot. The matte black finish gives it a sleek, professional look that fits well in any home setup.

Frequently Asked Questions

What is the Cafelat Tubbi knockbox made of?

The Tubbi knockbox is made from ABS plastic, with a food-safe rubber knock bar reinforced with stainless steel. The base includes a non-slip rubber pad. Only these materials are used—no metal bolts, no complex parts.

How many espresso pucks can the Tubbi knockbox hold?

The Tubbi knockbox can comfortably hold around 15 double espresso pucks before it needs to be emptied. That’s roughly equivalent to 30 single pucks, depending on size.

Is the Tubbi knockbox easy to clean?

Yes. The plastic tub is dishwasher safe, though the manufacturer recommends a simple rinse with mild detergent as it's usually enough. The rubber knock bar should be removed before cleaning.

Does the knockbox reduce noise when knocking out pucks?

Yes. The rubber knock bar, reinforced with stainless steel, is designed to absorb the impact from the portafilter. Combined with the flexible plastic and non-slip rubber base, it significantly reduces noise during use.

What colour is the Cafelat Tubbi knockbox?

The Tubbi knockbox is currently only available in matt black.

Does the Tubbi knockbox come with any assembly required?

No. It arrives as a single, fully assembled unit. There are no loose parts, screws, or bolts—you just take it out of the box and use it.

Recommended FrontStreet Beans for Home Espresso

For use with your Cafelat Tubbi knockbox, try FrontStreet Coffee’s Ethiopia Guji Humbera—bright and juicy with stone fruit and bergamot—or their Yirgacheffe, offering floral tones and citrus brightness. Both shine as single-origin espressos and are easy to tamp and knock out cleanly. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.