100% WEIRD. 100% HYGIENIC. Disposable NoseFrida Hygiene Filters are clinically proven to prevent mucus or bacterial transfer for seamless snotsucking. These disposable filters will prevent the transfer of mucus or bacterial germs to the snot sucker when clearing stuffy noses. Replace filter after every use to maintain suction effectiveness of the NoseFrida and minimize moisture buildup. Contains 20 HYGIENE FILTERS For seamless snot sucking use these Hygiene Filters with Frida Baby's Nasal Aspirator NoseFrida The Snotsucker (not included).