I got a set of glass tubes to store pre-dosed coffee beans.  This makes the espresso prep smoother but requires the beans to be weighed and “tubed” periodically.  The kit included a silicone funnel that does not work for whole beans.  I don't even think it would work for ground coffee.

I modeled this object in OnShape.  I printed it funnel side down with snug supports.  The top part of the funnel has an angle that may not print well without supports.  I probably could have cleaned that up but I'm new to OnShape and it seemed like too much bother.  

Glass tube dimensions:
Tube Diameter 30mm
Thread Diameter 26.5mm
ID Tube: 21mm