A stirring/oscillating device suitable for spray paint bottles.
In the original design, a 140mm fan was used, while this one is equipped with a 120mm fan.
In addition, I designed the top as a modular structure, which can be flexibly adapted to bottles of different sizes.

The base is available in two versions: one with a 21×15mm toggle switch socket, and the other with a 15×10mm toggle switch.
The entire set of devices is powered by a 12V power adapter
If you want to further adjust the vibration effect, you can also install an additional potentiometer mounting bracket.

Required accessories:

12mm computer cooling fan
4 pieces of 9mm×35mm compression springs
21×15mm or 15×10mm toggle switches
Solderless 2.1mm female DC power supply wiring terminals
4 screws and nuts with a length of 50mm and M3 threads

Tips: Due to the large amplitude of vibration, it is recommended to add weights under the base. Otherwise, the device is prone to swinging around on the tabletop during operation and may even tip over. You can find a heavy metal plate and fix it to the base; or place several bags of heavy screws or nuts on the base as counterweights to ensure the smooth operation of the device.