Filter is NSF/ANSI 53 Certified and reduces contaminants such as: aesthetic chlorine, chloramine, atrazine and particulate class V contaminantsInnovative gravity-fed filtration method in a portable filtration bottle ensures contaminants will not bypass the filter by forceOpen spout allows for great flow rate with no forceful sucking or squeezing requiredHygienic, locking, push button lid with one-handed operation and integrated carrying loop; 22-ounce capacityReplace filter every 20 gallons (or 128 full bottles); both bottle and lid are dishwasher safe
