Grinder-Side. 8-Point Magnet. Zero Scatter From Chute to Portafilter. The Funnel Cup Magnetic Dosing Ring attaches to your grinder’s discharge port — not the portafilter basket. The 40° expanded opening catches grounds as they exit the grinder chute, containing scatter from the output angle. Eight magnets hold the ring securely to the grinder port during grinding, then the ring detaches and magnetically transfers to the portafilter for a clean grounds-to-basket transfer with no scatter between the two. One-piece CNC-machined aerospace-grade aluminum in Grey and Silver. $18.90. Features 8-point magnetic system — eight magnets distributed around the ring for secure, even attachment to the grinder discharge port. Holds stable during grinding, including when the ring is inverted. Releases cleanly for portafilter transfer. 40° expanded opening — the flared 40° opening maximises the catch area at the grinder chute output, accommodating different discharge port angles and grinder geometries without grounds escaping over the rim. Grinder-to-portafilter magnetic transfer — after catching grounds from the grinder, the ring detaches and sits magnetically on the portafilter for transfer. Grounds move from grinder to basket in one contained step — no open cup, no scatter on the bench between the two. One-piece CNC aerospace-grade aluminum — machined from a single piece of aerospace-grade aluminum. No seams, no joints, no grounds trap points. Rinses clean under running water. Easy cleaning — flush with strong water flow. No disassembly required. One-piece construction means no crevices to trap grounds between uses. Dosing Ring Workflow Position The Funnel Cup sits at the grinder end of the puck prep workflow — it catches grounds at the source. The MHW-3BOMBER Magnetic Ring ($19.90) and Walnut Dosing Ring ($47.90) both attach to the portafilter basket and catch grounds as they’re dosed in. The Funnel Cup is used before those rings in the workflow: grinder → Funnel Cup catches → transfer to portafilter → portafilter-side ring (MHW-3BOMBER or Walnut) for distribution and tamping. You can use the Funnel Cup alone, or pair it with a portafilter-side ring for a fully contained zero-scatter workflow from grinder to puck. Choose Your Size Verify with Lastaforest whether the Funnel Cup is sized to specific portafilter diameters (51mm, 54mm, 58mm) or is universal across grinder discharge ports. If size-specific, add variant options. If universal, confirm and state explicitly.
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