Parametric espresso grinder funnel.

thingiverse

For years, I've dealt with coffee grounds spilling over while grinding into the handle of my portafilter basket. To solve this issue, I used a paper ring to increase its height, but now there's an even better solution that increases the diameter too! No more mess during brewing. The STL file provides a 78mm opening size (fits inside a standard 58mm portafilter basket) and adds about 30mm in height (with 10mm inside the basket). It's best to print this in "vase" mode for optimal results.