For La Marzocco

Blindshaker for La Marzocco (58 mm)

4.9 out of 5 · 47 reviews on Etsy

from 34.00 € Final price under §19 UStG, plus shipping: 7.90 € to the EU (sets of three or more pieces: 9.90 €), 4.50 € within Germany

Grounds in, lid on, shake, flip it into the portafilter. The box contains exactly the funnel that belongs on your La Marzocco: with bayonet, for 58 mm, with a groove for the rolled basket rim.

  • One path from the grinder into the filter basket: no transferring, no spooning, no extra container in between.
  • Four parts in the box: dosing cup, lid, plug and a funnel.
  • For La Marzocco and Gaggia. The funnel has been fitted and checked on both portafilters here.
  • 60 mm clear opening: you tamp through it without taking the funnel off.
  • Made of Bambu PLA Pure, 0.12 mm layer height.
  • No magnets: nothing that comes loose or gets lost.
With or without a grinder holder?
Order in the shop
  • Made and shipped within 1 to 3 business days from Munich
  • 14-day right of withdrawal, 30-day returns
  • PayPal, credit card, Apple Pay, Google Pay
  • Care: hand wash, not dishwasher-safe
Dosing cup with the lid on under the grinder chute
Grind, close, shake, flip.

The Workflow

Four moves, and nothing ends up on the counter.

You grind straight into the dosing cup, put the lid on, shake for a few seconds and flip the grounds through the funnel into the portafilter. The dosing cup holds a typical espresso dose with headroom to spare, so the grounds have space to move while you shake.

The grounds travel in one go: from the grinder into the dosing cup, from the dosing cup through the funnel into the filter basket. Nothing gets poured from one container into the next or spooned, so there's no point where anything can spill.

The plug, the conical stopper, sits in the bottom of the dosing cup. It fills the center so that the grounds are guided outward when you flip the dosing cup, instead of standing as a tower in the middle.

3D render of the 58 mm dosing funnel with twisted facets, from the side at an angle
Bayonet instead of a magnet: set it on, twist, it sits.

The Funnel

For 58 mm, with a groove for the basket rim.

The funnel grips the 58 mm portafilter with two opposing bayonet slots. Set it on, twist clockwise, and it sits tight and doesn't shift when you flip the dosing cup.

The narrowest point of the opening measures 60.0 mm. A 58 mm tamper goes through, so you don't have to take the funnel off to tamp.

The top rim of the filter basket isn't flat, it's rolled into a half-round. Funnels with a flat seat therefore rest on a curve, and a gap is left. This seat has a groove with a 2.8 mm radius instead, which follows the rim.

Dosing cup without lid in the holder, the twisted groove pattern from the front
From the chute into the portafilter, with no stop in between.

With or without WDT

What the piece does for you.

The dosing cup catches the grounds right under the chute and releases them through the funnel into the filter basket. In between, nothing is left on the counter, nothing clings to an extra container, and you don't have to transfer anything. The lid closes tight, so you can shake hard.

Some people use it to replace their WDT tool, others keep using both. Either works, and you'll quickly find out what suits you.

What shaking does for your espresso beyond the clean transfer is disputed among baristas. We make no promises about that.

The dosing cup stands in the holder under the coffee grinder's chute
The dosing cup works everywhere, the funnel makes the difference.

The Fit

La Marzocco and Gaggia, no promises beyond that.

Dosing cup, lid and plug don't depend on your machine. Only the funnel decides where the grounds go next.

Confirmed for La Marzocco and Gaggia (Baby, Carezza, Classic, Espresso, Deluxe, Evolution, New Baby, Baby06, Baby Dosata, New Espresso 06). Both portafilters are on the table here, the funnel has been set on and twisted, and it sits.

This funnel is not built for the E61 group (Rocket, ECM, Lelit, Profitec, Bezzera, Quick Mill, Rancilio). That's arithmetic: the E61 head rim measures 72.8 mm, our collar bore 72.2 mm. It will not go over.

If you have a different 58 mm portafilter, give it a try. We don't know whether it fits, we haven't measured it. If it doesn't fit, send it back.

The Blindshaker from the side, lid and dosing cup
Lid on, a few seconds, done.

Using It

How to get the most out of the shaker.

Five steps, in the order you do them.

  • A drop of water on the beans, before grinding. What clumps later starts in the burrs, not in the dosing cup. One drop lowers the static charge by 50 to 90 percent (Méndez Harper, Matter 2023). Go easy on it, too much water harms the burrs.
  • Don't grind up to the rim. When it's full to the brim, nothing moves inside and the shaking achieves nothing.
  • Shake for five seconds, side to side rather than up and down. Longer isn't better: after 30 seconds, around 0.1 g of fines falls through the bottom of the basket (Barista Hustle).
  • Clumps can remain, even with an 86 euro aluminum shaker. The dosing cup is a clean way to transport the grounds, not a clump breaker.
  • Then three to five seconds with the WDT tool. That's also the protocol in the current espresso physics paper: shaker first, then WDT, then tamp (Waszkiewicz 2026).

At a Glance

The facts about the 3D printed Blindshaker.

Fits
58 mm portafiltersConfirmed for La Marzocco and Gaggia (10 models). Not for the E61 group: head rim 72.8 mm versus collar bore 72.2 mm.
In the box
Four partsDosing cup 77.3 × 77.3 × 68.5 mm, lid, plug, funnel 80.4 × 80.4 × 30.7 mm with bayonet.
Clear opening
60.0 mmNarrowest point in the funnel. A 58 mm tamper goes through.
Magnets
NoneNothing that can come loose, and the material of your portafilter doesn't matter.
Material
PLA PurePrinted from Bambu PLA Pure, a filament for food contact: its five ingredients are each tested against EU Regulation 10/2011, plus EN 71-3 and UL GREENGUARD. Not a water-carrying part, so no PETG needed.
Layer height
0.12 mmPrinted finer than usual, 0.2 mm is the norm. That makes the grooves between the layers shallower, and that's exactly where coffee grounds would otherwise get stuck.
Weight
250 gShipping weight of the set.
Care
DryUse it dry and wipe it out dry. Not in the dishwasher and not in hot water.
Manufacturing
MunichPrinted to order, finished by hand, engraved on request.

Frequently Asked Questions

Answered briefly.

Does the Blindshaker fit my machine?

Confirmed for La Marzocco and Gaggia: we have both portafilters here and the funnel sits on them. On any other 58 mm portafilter we don't know. "58 mm" describes the filter basket, not the bayonet above it, and that is exactly where manufacturers diverge.

It is not built for the E61 group, where the head rim at 72.8 mm is wider than our collar bore at 72.2 mm.

What's the difference from the Gaggia set?

None. It's the same box with the same contents. It's listed twice so you can find it under your machine's name.

What do I get out of the shaker?

It gets the grounds cleanly from the chute into the portafilter, with no extra container and without leaving anything on the counter. The lid closes tight, so you can shake hard.

Some people use it to replace their WDT tool, others keep using both. What shaking does for your espresso beyond that is disputed among baristas, and we make no promises about it.

What is the plug, the stopper in the dosing cup?

The cone in the bottom of the dosing cup. It fills the center so the grounds are guided outward when you flip the dosing cup, instead of standing as a tower in the middle.

Can I tamp through the funnel?

Yes. The narrowest point measures 60.0 mm, a 58 mm tamper goes through, and the bayonet holds the funnel firmly in place. That's exactly what it's there for.

Is the dosing cup food-safe?

It's printed from Bambu PLA Pure. That's a filament for food contact: its five ingredients are each tested against EU Regulation 10/2011, plus EN 71-3 and UL GREENGUARD. What's tested is the material, not our printer, which is why we put it this way and not as a seal.

The manufacturer names two limits itself, and we pass them on: no liquids, because the grooves between the layers are too coarse for that, and nothing above 60 degrees. For dry coffee grounds, for a few seconds, neither is an issue. On top of that, we print the part at 0.12 mm instead of the usual 0.2 mm, so the grooves are shallower.

Do I need the grinder holder for it?

No, the Blindshaker works without it. The holder takes it on the grinder where the portafilter usually sits, so you don't have to hold the dosing cup while grinding. It's available for the DF64 and the DF54, either on its own or right here in the options. For a different grinder, get in touch.

One more thing

More room for your favorite cup.

The Blindshaker stands in the holder under the coffee grinder's chute
from 34.00 € Chosen:
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