Models
Mixing 3D Printable Models. Makeshape.co have 3 Mixing 3D Printable Models.
Multi Color Filament – 80g 4/3/2-Colors and Mixer
Makerworld
Fmod
Free
Measuring/mixing cups – Mess/Mix-becher 1+2+3+5+10ml
Printables
RPK
Free
Airbrush Paint Mixing & Pour Cup (Vase or solid for vacuform)
Printables
Ecclectic
Free