Nasopure Refill Kit 40 Buffered Neti Pot Salt Packets. Each packet features a proprietary blend of neti pot salt. Each buffered salt packet makes 4 oz buffered hypertonic or 8 oz isotonic (milder) solution. Nasopure buffered salt packets contain 3.75 gram weight of pharmaceutical-grade sodium chloride and sodium bicarbonate making the nasal wash very comfortable.<br>