This is a funnel designed to work perfectly with Resin Filters from 3DMaterials (https://www.3dmaterials.com/sub/resins.php?ptype=view&prdcode=2109150011&catcode=10000000&page=1&catcode=10000000&searchopt=&searchkey= )
print with no supports on an FDM printer at 100% infill
The author hasn't provided the model origin yet.