Protect your body from contaminants with the Superior Gravity Filtration Bottle from Thermos. It’s an innovative gravity-fed filtration system in portable easy to drink thermos bottle. It features a method that allows water to pass through the filter naturally and not by force, giving it increased contact time with the filter and resulting in contaminant-reduced water that is ready to drink. The filtration bottle reduces contaminants such as aesthetic chlorine, chloramine, atrazine and particulate class V contaminants, as well as bad tastes and odor, from your water. It lasts for approximately 20 gallons (128 full bottles), is enhanced with DuPont licensed filtration, and is NSF Certified. It’s made from BPA-free Eastman Tritan copolyester material and has an open spout that allows for great flow rate with no forceful sucking or squeezing required. It also features a hygienic, locking, push button lid with one-handed operation and integrated carrying loop for attaching the bottle to your camping bag or backpack. COLOR: Clear. CAPACITY: 20 Ounces with filter, 22oz without filter. SIZE: 3x11 Inches.