About This Protects against chlorine, organic chemical matter, and sand, dirt, cloudiness for improved taste Compatible with all LifeStraw Go Water Bottles, LifeStraw Universal, and LifeStraw Steel; Includes 2 carbon filters Independently lab tested Every fill of your LifeStraw Go, LifeStraw Steel, or LifeStraw Universal compatible bottle avoids the need for single use plastic bottles of water! Your purchase has impact: one purchase, one child, one year of safe water Overview Material : Carbon Fiber, Plastic Product Dimensions : 0.5"D x 0.5"W x 1"H Item Weight : 10 Grams External Testing Certification : All Life Straw water filters are tested in our accredited lab and independently tested to meet us EPA and NSF/ANSI international standards All Life Straw water filters are tested in our accredited lab and independently tested to meet us EPA and NSF/ANSI international standards Product Benefits : Improves taste and protects against various contaminants