My problem was pouring coffee from retail bags into my coffee container always resulted in fresh aromatic beans all over the floor.

Easy funnel to design but requires measuring with some accuracy. My containers have a 3cm opening so took into account thickness and drop in distance… Oh you don't need to worry about my issues! I've uploaded a parametric file for makers to edit: body length, tip length, radius opening and thickness. The smart thing is, tip radius is a calculated parameter based on thickness and your measured radius - of a chosen container opening. 

Recommend to print using food safe filament eg, PETG. No need for brims or supports!