The 28oz Advanced Seychelle Water Filtration pull top bottle is the perfect solution for those traveling to foreign countries where safe drinking water is at a premium. It works by a combination of sucking the water out of the top and squeezing the bottle at the same time. The insulator sleeve attaches to a belt or backpack, and is great for any outdoor use: walking, hiking, biking, travel, camping or emergency preparedness! The bottle produces up to 100 gallons of great-tasting water; and is equal to 757 half liters of bottled water! Key Features: ** Now with BIOSAFE®, removes up to 99.99% of bacteria, virus, contaminants and pollutants found in drinking water sources using its proprietary Ionic Adsorption Micron Filtration System. ** Contains Iodinated Resin (EPA Reg. # 35917-2) and other proprietary media which effectively reduces virus and bacteria to six logs (99.9999%). ** Produces up to 100 gallons of filtered water or more depending upon the quality of the source water. ** Has a screw on/off fill from the top cap for easy filling. ** 28 oz size is compact, light weight and easy to use! ** Tested by Independent laboratories using EPA/ANSI protocols and NSF Standards 42 and 53. ** Environmentally safe! Does not pollute the countryside! ** Reusable – made of FDA approved low density polyethylene #4 plastic – ** Will not leach! BPA free! ** Filter is replaceable. ** Seychelle Ionic Adsorption Micron Standard Water Filter removes up to 99.9999% of contaminants and pollutants found in fresh water supplies including Ascetics such as Chlorine, sediment and dirt; Biologicals such as Giardia, Cryptosporidium, E-Coli Bacteria; Chemicals (VOC’S) such as DDT, MTBE, Benzene, Chloroforms (THM’S); and Dissolved Solids (Heavy metals) such as Arsenic, Lead, Mercury, Copper, Zinc, Aluminum and Chromium 6. ** Seychelle Ionic Adsorption Micron Water Filter is ideal for any use; like traveling, hiking, biking, camping, fishing or for emergency purposes.