Tubbi Knockbox: A Durable Solution for Espresso Puck Disposal

If you pull espresso at home regularly, you’ve likely struggled with what to do with the spent puck. Slapping the portafilter against a trash bin is messy, noisy, and can damage your equipment. Many home baristas look for a simple, mess-free way to knock out espresso pucks without damaging their gear—or their kitchen counter.

The Cafelat Tubbi knockbox solves this with a minimalist design: a single-piece ABS plastic tub with a reinforced rubber knock bar. It holds up to 15 double espresso pucks before needing to be emptied and weighs just 270g—small, tough, and easy to clean.

What Is the Tubbi Knockbox?

The Tubbi knockbox is a compact accessory built for home baristas to safely and quietly dispose of espresso pucks. Designed by Cafelat and distributed by (Caffe Alto), it took over a year of development and multiple prototypes to arrive at its current form—a durable, no-frills solution. There are no screws, bolts, or moving parts beyond the rubber knock bar and plastic tub.

How It Works: Design and Durability

The Tubbi knockbox is made from flexible ABS plastic, chosen for its ability to absorb the impact of the portafilter without cracking or wearing down. The rubber knock bar is food-safe and reinforced with stainless steel to improve longevity. This bar is engineered to reduce both noise and the force transferred back to the portafilter. Underneath, a non-slip rubber pad keeps the knockbox stable on your countertop while cutting down vibrations and further muffling noise. Despite its small footprint, it’s built to last.

How to Use and Maintain the Tubbi Knockbox

To use, simply position your portafilter over the knock bar and strike firmly to dislodge the puck into the tub. The design requires no assembly—you get a complete unit in the box. It can comfortably hold 15 double espresso pucks. When full, lift out the rubber knock bar and discard the pucks. For cleaning, a rinse with mild detergent is enough. While the plastic tub is dishwasher safe, a quick hand wash is sufficient for daily maintenance.

Frequently Asked Questions

What is the Tubbi knockbox made of?

The Tubbi knockbox is made from ABS plastic, rubber, and stainless steel. The main body is a durable ABS plastic tub, the knock bar is rubber reinforced with stainless steel, and there's a non-slip rubber base.

How many espresso pucks can the Tubbi knockbox hold?

The Tubbi knockbox can comfortably hold up to 15 double espresso pucks before it needs to be emptied.

How do you clean the Tubbi knockbox?

You can rinse the Tubbi knockbox with mild detergent. The plastic tub is dishwasher safe, but a simple hand wash is effective for everyday cleaning.

Does the Tubbi knockbox come with any assembly required?

No, the Tubbi knockbox comes fully assembled. It includes one complete unit with the plastic tub and knock bar—nothing to put together.

Is the Tubbi knockbox noisy when knocking out pucks?

No, the Tubbi knockbox is designed to minimize noise. The rubber knock bar, reinforced with stainless steel, absorbs the energy from the portafilter to reduce both noise and vibration.

What color is the Tubbi knockbox available in?

The Tubbi knockbox is available in matte black.

Recommended FrontStreet Beans for Home Espresso

For home baristas using the Tubbi knockbox, try FrontStreet Coffee’s Ethiopia Humbera for vibrant fruit and floral tones, or the Colombia Huila for balanced caramel and citrus. Both shine as single-origin espressos and pair well with the clean puck ejection the Tubbi enables. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.