A dosing cup built around two practical details most don't get right. First, the tri-lug three-ear lock: three fixed ears that seat firmly on 58mm portafilters without wobble or rotation during the transfer — both hands stay on the cup, not stabilizing it against the basket. Second, the arc-form curved inner wall: the curved geometry guides grounds toward the center of the cup as they settle, forming a dense, centered mound rather than a flat or scattered distribution across the basket. That centered mound is easier to level and distribute evenly before tamping. CNC-machined from 5–6mm aluminum alloy with an anodized finish — thick walls for rigidity, anodized surface for wear resistance and reduced static charge buildup during grounds transfer. Compatible with Italian-style hand grinder transfer workflows and direct grind-through dosing setups. Available in Black or White, 58mm. What's Built In Tri-lug three-ear lock — Three fixed ears seat firmly on 58mm portafilters; no wobble or rotation during transfer, no need to stabilize the cup against the basket Arc-form curved inner wall — Curved geometry guides grounds toward center as they settle; produces a dense, centered mound that's easier to level and distribute before tamping CNC-machined 5–6mm aluminum alloy — Thick walls for rigidity; no flex during the knock-through transfer stroke Anodized finish — Wear-resistant surface; reduced static charge buildup compared to bare aluminum during grounds transfer Knock-through dosing compatibility — Aligns with powder bowl for direct grind flow into basket in a single motion; compatible with Italian-style hand grinder transfer systems At $35.90 this is the most substantial dosing cup in the lineup by wall thickness — the 5–6mm CNC aluminum is noticeably heavier and more rigid than the thinner stamped alternatives, which is the build quality you can feel immediately when you pick it up.
