Keep your filtration bottle primed and ready for the next big adventure. The replacement LifeStraw Bottle Filter Set in size small fits the Eddy® + 32 oz filtered by LifeStraw® bottle made with Tritan™ Renew plastic. Water passes through two separate stages of filtration - the Hollow Fiber Filter removes bacteria, parasites, and microplastics and the Ion Exchange Filter reduces lead, bad taste, chlorine and other unwanted chemicals.