DeVilbiss Traveler has been our family go-to portable for several years. I even use it at home.

A mesh unit is a handheld compressor with a mouthpiece directly attached. An impeller & a screen break up the liquid into droplets to be inhaled.

The only one I ever recommended was the Phillips Innospire Go, which is no longer made. The ones on Amazon and similar sites are not meant for rigorous daily use, and many cannot be sterilized.

Sue