Water Jug Funnel

I repurpose water jugs to store distilled water used with my aquariums and houseplants.  I got tired of spilling water and designed this funnel.  

It should fit any gallon jug or similar screw cap, but I have only tested on Kroger brand containers.  I have included the Fusion360 file in case you want to customize the size.  Variables have descriptive comments.  You can try scaling the funnel in your slicer, but I recommend editing the design file if you need to make large adjustments.  

I have included some stl files with varying diameters.  They alter the opening by 1 mm at a time by shifting both the inner and outer diameters.  The exact values are labeled in the file notes for each download.  

You should probably print the funnel upside-down for better stability, though I had enough bed adhesion to print it right side up.  

Thanks for visiting, and enjoy!