Yes, it is an "active" device. Manastin 40 liter,
https://www.amazon.com/Manastin-Electric-Humidors-Compressor-Cooling/dp/B0DTPRN2N6/ref=sr_1_1_sspa
In the bottom, it has a simple tank filled with the liquie and a honeycomb cardboard-like material on each side to "absorb up" the material...