Replace filter after every use.
•Â HYGIENIC: Disposable filters are clinically proven to prevent the transfer of mucus or bacterial germs to the snot sucker when clearing stuffy noses. (20 ml) •Â DISHWASHER SAFE: The blue nasal tube, red mouthpiece, and filter cap are top-rack dishwasher safe for easy cleaning. •Â TWO INGREDIENT SALINE: Natural sea salt and purified water specially formulated for small noses.