Professional Design: Nasal Wash Bottle Is Designed According To The Internal Physiological Structure Of Human Nasal Cavity, Irrigating Nasal Passages And Sinuses Rinses Out Mucus And Various Irritants. For Allergies & Cold:Clean Your Nasal Mucous. If You Have A Pollen Allergy And Flush Out Any Impurities, Pollen Or Other Irritants From Your Sinuses. Easy To Use: Unique Construction And The Patented Button Allow A Perfect Water Flow, Transparent, So It Is Easy To See The Water Level, Easy For Both Adults And