I heard a lot of folks mention these in different threads so I looked it up to see what this was. With the exception of the device, it seems to me to be just a saline solution AKA eye wash that costs a small chunk and is disturbing to look at.
The more I thought about this the more I wanted to test a theory. At work I have small vials of disposable eye wash (less than a ounce) I took one of these over to a sink and tested a flush of both nostrils with just one small vial.
The vials can be bought at Walgreens were you would have 6 washs for a $1.00 each
Also, you could take these anywhere, just in case http://www.walgreens.com/store/c/ocufresh-eye-wash/ID=prod6037457-product?ext=gooPersonal_Care_PLA_Eye_Washes_prod6037457_pla&adtype=
Please keep in mind that I have never used a nettie pot in my life and I am only assuming while doing a test that I forced water into one nostril while blowing out the other.
Either way my nose is clean lol