I like to have a paint mixer with zylindrical shape and lower and upper guidance ring,
so I created my own design.
The diameter is 40 mm and the high 25 mm.
There is a hole for a metal shaft with M6 thread.
I like printing treads, but usually its too tight and I use a tap to make it perfect.

Printed with 0.4 mm nozzle, 
Because of the angle of the wings, it needs a small layer heigth, it prints good with 0.12 mm.

For the upper ring I use tree support. 
Avoid support of the wings.

It works quite well on fluids with good viscosity as paint or epoxi. I don't recommended it for concrete etc…

Addendum: 
After the first tests I decided to create a model for inverse rotation.
The inverse model pushes the fluid down with the standard rotation direction of your drilling machine and avoids spilling.
So I recommend to use the inverse model !