Transparent 58mm Portafilter Dosing Cup with High Impact Plastic. Precision designed 58mm to fit in to any portafilter so you can flip the grinds neatly in. Super sharp tip to reduce empty space around portafilter edge. Use the Dosing Cup as a vessel to weigh your beans, dump them into your grinder, and then grind directly into the Cup. Place your portafilter over the top of the Dosing Cup, flip them over, shake to de-clump and you are done! With the transparent feature you can see your grind quality and distribution evenly before even lifting the cup. Neater workflow, better distributions and reduced spills.