Sporty and squeezable, this filtered bottle is perfect to filter as you drink. Innovative filter system filters ups to 100 gallons. Reduces chlorine taste and order in tap water. Pull-top sipper cap. BPA free. Can purchase filter refills at http://www.coolgearinc.com style 1422 replacement filter 1522. Replace filter on average 4 months depending on use. 26 Oz.