Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:3996821.
I needed a funnel to pour my desiccant back into the bottle after recharging. The funnel I had was too narrow in the spout. I wanted to do in in vase mode (spiralize), but didn't find exactly what I wanted.
I made this using CadQuery (https://github.com/dcowden/cadquery or https://github.com/CadQuery/cadquery) and FreeCAD. All of the diameters and heights are easily adjusted
If you want to try CadQuery, I think FreeCAD is the easiest way. Once you have FreeCAD installed, you should be able to install CadQuery inside FreeCAD through their built in addon manager.
If you don't want to mess with CadQuery or FreeCAD, if you leave a comment or message me, I can make and upload a different sized stl file.