Paint shaker attachment for Vallejo paint bottles (17ml). Fits a low budget massage gun from Amazon (<20€).
The bottles snap into the holder. If you want to play it safe, you can secure the bottles with a rubber or Velcro cable tie at the recess.
When you need other measurements, just let me know.
0.2mm
infill: 25%
4 Walls
4 Top/Bottom Layer
Support on buildplate only