I use the Pari Trek 1 for travel. It was a little expensive (I think around $200) but has been worth every penny. I take it on vacation and I can do my treatment anywhere. Runs on a lithium battery and can be recharged in the wall or usb outlet, so even in my car. The small travel nebulizers I tried before couldn’t handle the 7% saline I use. I’m sure you can find them in a few different places on line. I purchased mine through Nebology. Com because they have great customer service. Hope this helps.