Known for its anti-fungal, antiseptic and antibacterial properties; daily washing of the nasal passages with HoneyDoc is a natural, simple way of achieving relief of sinusitis, cold and flu symptoms, and acute or chronic nasal cavity irritations. This particular product is designed to be used with the flexible Power Rinse Bottle (not included).  Warning: Do not use HoneyDoc if you are allergic to or easily irritated by honey or honey products.