Espresso Portafilter Funnel 51mm
thingiverse
My coffee grinder just spits out grounds into the trash can, forcing me to pour them into my portafilter and the whole process is a real pain. I stumbled upon a clever funnel design on Reddit and thought, "Why not give it a shot myself?" I had to carefully sand it down to get a snug fit. The internal diameter of 51mm matches perfectly with my tamper size.
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