Fellow Prismo Aeropress Review (a No Nonsense Review)

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Prismo Aeropress review for a no-nonsense take on the Fellow Prismo attachment used with the Aeropress coffee maker. 

prismo aeropress review

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What is the Prismo?

The Prismo is a pressure-actuated valve designed to be used with the AeroPress coffee press. The Fellow Prismo attachment allows for a build-up of pressure to brew espresso-style coffee and creates a no-drip seal. The Prismo’s valve stays sealed until you apply pressure. This build-up of pressure allows you to brew coffee closer to an authentic espresso. 

Fellow Prismo Aeropress Review

We have been making all of our coffees with the Aeropress paper filters up until now. Since the Aeropress coffee maker is amazing to begin with, we honestly had no idea how much better the Aeropress brewing experience could be. We didn’t think it was possible to get any better.

This fellow prismo review is for the Aeropress filter attachment. This filter is used in place of the standard filter attachment that comes with the Aeropress. 

aeropress fellow prismo attachment review

Prismo Filter Attachment vs Standard Aeropress Filter Attachment

The fellow prismo attachment has a reusable metal filter. This reusable 150-micron filter has the Fellow logo etched across the center. The prismo also has a pressure-actuated valve that prevents any coffee from dripping through the plastic filter cap. 

fellow prismo filter attachment

When we compare the two filters you can see that the filters are both very thin, which is necessary for a flavorful cup of coffee. The paper filter needs to be thrown away after each use, whereas the fine metal filter is reusable and creates less waste. If you are an avid coffee lover the additional cost of the prismo attachment will pay for itself over a short time. You won’t have to worry about buying more paper filters ever again. 

comparing the reusable metal prismo filter to paper aeropress filter

Flip over the filter caps. You can see that the Prismo attachment has a single one-way valve. The Aeropress flow control filter cap has multiple holes for the coffee to pass through. 

comparing the single one way valve prismo filter to standard aeropress filter

How to Make Coffee with the Best Fellow Prismo Aeropress Attachment

When making your espresso-style coffee, first place the reusable filter into the prismo cap. Next, go ahead and attach the prismo attachment to the Aeropress chamber the same way you would with the regular Aeropress filter. Make sure to twist the cap to ensure that it is secure to the brew chamber

how to use the fellow prismo attachment

From here the brewing process is the same as when you use the paper filter. Place the Aeropress onto a coffee mug. Grind your coffee beans and add the coffee grounds to the chamber. How much coffee you use will vary depending on which espresso style coffee recipes you are making. Find more Aeropress recipes here: Aeropress

coffee grinds in aeropress chamber

Pour hot water into the chamber.

prismo aeropress attachment for making espresso

Make sure to stir your water and coffee for at least 60 seconds. Stirring makes sure that all of your coffee grounds make contact with the water for a full immersion brew.

aeropress brewing process

Place the plunger into the top of the chamber to allow the coffee to steep. When you do this, the heat from the water and the seal from the plunger along with the no drip seal of the cap will create a build-up of pressure within the chamber. This buildup of pressure will contribute to great coffee and a bold flavor. This is very similar to the inverted method without having to flip your Aeropress upside down. 

how to prevent drips with aeropress

No Drips

Often, at this point, with the regular Aeropress filters you will see a small amount of drip through from the filter cap into your mug. This is normal and ok. But if the drip is excessive then you will need a finer grind of coffee. Using the Prismo filter attachment you will notice that there is no drip through. This is a great option if you don’t have your own coffee grinder, and you use pre-ground coffee. Most pre-ground coffee is medium-grind and will drip through the standard filter. 

no drip valve with aeropress

Final Step of this Brewing Method

Now that the coffee is ready, go ahead and apply enough pressure to the plunger to push the coffee through the cap and into your mug. Here you will notice another difference from the standard Aeropress. With the prismo filter attachment, the coffee flows out in a single stream as opposed to multiple holes of the standard flow cap. Just like with the standard Aeropress filter cap, you don’t need a great deal of pressure to get your coffee. 

single stream aeropress coffee

Since the extracted coffee flows through one single valve you won’t see much foam on the end of the cap as you often due with the standard Aeropress cap

how to make amazing coffee with aeropress prismo attachment

Clean Up

At the end of the coffee brewing routine twist off the prismo attachment. Separate the metal filter from the cap and rinse with warm soapy water. Toss the used coffee grounds into a compost bin if you garden. 

prismo filter and valve


The prismo Aeropress attachment gets a thumbs-up from us. It is a must-have for coffee enthusiasts and all Aeropress users.  This little filter attachment will up your coffee game and needs to become a regular part of your morning routine. You can use this attachment for endless recipes, including cold brew, lattes, and any espresso-like drink that you want. Who needs an espresso machine when you can do so much with the Aeropress and the Fellow Prismo filter attachment? 

Check out more delicious coffee recipes made with Aeropress here: Aeropress

how to make espresso at home without an espresso machine

Make sure to check out The Best Accessories for your Aeropess Coffee Maker to take your coffee making to the next level here: Best Aeropress Accessories.

Get the Fellow Prismo filter attachment here: Fellow Prismo Attachment for AeroPress Coffee Maker

fellow prismo aeropress filter

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