Interesting, I did not realize there were portables like the one in your picture.Maybe you mean something like this?)
I remembered after writing the reply, that there are small, personal generators that people wear around their neck. These are quite common now, and I often see people with them. These were created for Covid/anti-virus protection, to condition the air around you. Those "should" be easier to use, and would serve a double purpose. And look "cool", as they also have a flashing LED. Though I would worry that the LED would generate spurious EMI.....