Funnel designed for putting desiccant back into small containers after recharging. Avoid spills!

This should work with most containers that are typically used inside filament reels.

I printed this with Zyltech ASA-GF for fun (it feels very robust!), although it should work with pretty much any filament. 

Print with the widest part on the plate, no supports. Add a brim if you need, or use a different filament / adhesive etc.