Our silicone bellows for the Niche Zero and Niche Duo sits on the bean funnel and allows you to blow air through the grinder with every pump to push out most, if not all, the residual coffee grounds inside the grinder out into your dosing cup or portafilter. With our bellows you can get out of the grinder what you put in, achieving up to 0.0g retention*. It's 100% designed in-house, the first to ever exist in the market, and bespoke for the Niche Zero and Duo, and is superior to our original first-to-market 3D printed TPU version (discontinued Feb 2023) in terms of texture, flexibility, air-tightness, and durability.

[In-Depth Look]

For a long, in-depth look at the bellows in action check out the video:
https://youtu.be/DxMG56t1UiQ

[Design Features]

Simplicity and maximum effectiveness are my design goals, and both are carefully infused in my bellows' design

The Niche Zero / Niche Duo Bellows complements the grinder's original design rather than replacing any parts and upsetting its visual balance
Specifically designed to fit into the funnel exactly
Takes seconds to place into the funnel for use
Low profile design allows you to close the lid over the Niche Duo / Niche Zero bellows while it's on the funnel
Fits and works with or without the Niche Zero Flow Control Disk (anti-popcorn disk). Acts as an anti-popcorn device for the Niche Duo
Prevents popcorning when seated in the Niche Duo during grinding
No tools necessary for installation
No modifications to the grinder needed
Easy to clean
Odourless material so it does not impart any smells to your ground coffee

[Variants]

V1.1

The most current and best version. Has a smooth matte surface that is dust resistant, has accurate shape, and has good wall thickness consistency. Note that some "pieces may come with a very slight oval opening, but will conform nicely when placed into the Niche funnel.

V1.1 - Subpar

These pieces will have a pronounced distorted form, and possibly other surface blemishes, but they otherwise are fully functional. Although some of the openings of the bellows may look far from circular, they will conform when placed into the Niche funnel. For optimal air-tightness on the Niche Duo, the non-subpar version is recommended.

See here for the history of the variants, batches, and versions.

[Compatibility]

Niche Zero
Niche Duo (Light press fit into funnel hole)
INTROVERT Single Dose Hoppers
Varia VS6 (Fits on the stock funnel and replaces stock hopper)

[Use As A Puck Bellows]

As a bonus, you can effortlessly pop out spent pucks from the other side of the basket, as long as it's 43mm in diameter or larger. Perfect to use with my 58-49mm Stepdown Baskets. Note that subpar versions may not work as well if the non-circular opening doesn't completely cover the bottom surface the basket due to impartial seal.

[*Disclaimer]

Grinding after changing grind size or using darker roasts/oilier beans may increase retention.
Achieve the best results with lighter roasted beans and at a consistent grind size setting.
This listing is for the bellows only. It does not include the grinder

Introvert is not affiliated, associated, authorized, endorsed by, or in any way officially connected with Niche, or any of its subsidiaries or its affiliates. The name Niche as well as related names, marks, emblems and images are registered trademarks of their respective owners.

Duo

Silicone Bellows for Niche Zero and Niche Duo - Near Zero Retention