Weber Workshops Single Dosing Funnel made of stainless steel
This is what Weber Workshops says about the trochter:
Frustrated that we couldn't find a suitable funnel to pour the coffee into our bean cellars, we decided to design the perfect funnel. The right overhang into the cellar so it can stand on its own, an opening large enough for the beans to easily fit through, and made from food grade 304 stainless steel because we wanted the absolute best.