Mostly printed tumbler

If you print with bronze, copper, aluminium or steel filament, this can help you with the finish afterwards.

* Print all parts once
* Print container-cap.stl one extra time (so you have a cap at both ends)
* Print locking-plug.stl three extra times

Get four skateboard ball bearings (normal)
With the locking plugs, attach them into the frame.
Get a geared electrical motor:

From amazon:
https://www.amazon.com/Cylewet-Motor-Shaft-Arduino-CYT1037/dp/B01N9MS3UZ/

From kell.com in Sweden:
https://www.kjell.com/se/produkter/el-verktyg/elektronik/elektromekanik/motorer/luxorparts-hjul-med-motor-och-vaxellada-p90467

From aliexpress: (link is probably not that stable)
https://www.aliexpress.com/item/32868653773.html

Attach the motor gear to the motor shaft. Place it in the frame. As a power source I use a USB-cable. Strip it and use the black and red wire for power. I just twist each end, insert it into the holes on the motor and bend them. Solder if you want.

Put