Simple E-Juice Mixer

NOT FINISHED!
A work in progress, seeing no e juice mixer here on thingiverse i figured i would share my project. Designed for 5ml bottles

Main problem: Figure out a way to secure the top part (Toppanel.stl) while still being able to remove it easy.

1x stepper motor (Nema 14 or alike)
1x Easydriver (or any other stepper motor driver)
2x MR83ZZ bearing
1x 3mm rod