Saline solution salt is highly purified, Non-Iodized sodium chloride made specifically for use with nasal rinsing devices such as squeeze bottles, Neti pots and nasal syringes. 99.99% highly purified sodium chloride. Use distilled, sterilized or filtered tap water (Use a filter with an absolute pore size of 1 micron or smaller) to mix the Nasaline salt. Once mixed, use the saline within 24 hours or discard.