Be careful about mixing your own....need to keep it sterile.
I get a box of 50 vials, 15 mls each vial, sterile 10% hypertonic saline solution, from a Respiratory pharmaceutical company for about $10. I can't believe someone above said it was going to cost over a $100...or whatever. I started it on my own about 8 or 9 years ago, before there were any studies out, against my doctors wishes. Now he says good thing I did...
I just dilute it w/ sterile saline (bronchosaline, or the pink saline vials)