Ausi Silicone Retention Bellow

If you grind espresso at home and obsess over repeatable doses, leftover coffee in the burr chamber is a tiny problem that wrecks consistency — this silicone bellows is a low-cost way to fix it. It’s a simple replacement cap that lets you blow or squeeze residual grounds out of the Niche Zero/Duo so your next dose starts clean. ## What makes it worth it It’s made from food‑grade silicone and built to flex for repeated squeezes without cracking, so it’s both safe and long-lasting compared with thin plastic caps. Because it’s explicitly shaped to fit Niche Zero/Duo hoppers, it forms a seal that channels air where you need it, which reviewers and aftermarket makers say drops retention from the Niche’s already-low level to effectively near‑zero. Finally, it’s manual and immediate — you squeeze or tap the bellows after a grind and the remaining fines are cleared without disassembling the grinder. ## Where it falls short This is a small, manual accessory — it doesn’t eliminate the need to dose, tamp, or purge properly, and it relies on you to remember to use it; it also offers no electronic or automated solution and may feel like an extra fiddly step if you rarely switch beans. If you own a Niche Zero/Duo and want tighter dose-to-dose consistency, buy this to remove leftover grounds; if you don’t change beans often or already use a workflow that leaves no retention, you can skip it.

£9.99