Needed a funnel for chemicals (not to contamitate our proper food grade funnel). Might as well share.
2 Perimeters. As non-leaky as your tuning competence.
Sliced upside down, if that is not obvious. Use 0.4 line-witdh.
This is just a quick and dirty job. Will work, hopefully. :)

Chemical resistant as the material of choice. I'll try PETG for photo development stuff.

Source file included.

Oh, I printed it without supports or brim. Just skirt.