Yes, you can see the the star shaped swirl breakers in the photograph. One reason for the replacement over the mason's jars was to get the additional height.
The mesh is an interesting way to deal with the swirl. I used to have the old rectangular jars for this, but they were broken or disappeared in storage.
The system is supposed to go back and forth. The motor on it seems to be a replacement shaded pole fan motor. There is still cam circuitry in the base to reverse the polarity. The start stop action seems to work well enough.