The 28oz Seychelle Water Filtration Flip Top Bottle is the modern day answer to clean, great-tasting drinking water for the active lifestyle. It was designed with the consumer in mind in that you drink water from it at a 45 degree angle below your mouth thus avoiding waste and spilling! It comes with an attractive insulator sleeve, which can attach to a belt or backpack, and is ideal for the outdoors: walking, hiking, biking, travel, camping or emergency preparedness! The bottle is filled from the top and produces up to 100 gallons of great-tasting water filtered water equal to or better than bottled water. It is our best selling water filtration bottle. The Standard filter is ideal for any in or out-door use; like traveling, hiking, biking, camping, fishing or for emergency purposes. It can be used with any type of water source; tap or rainwater, rivers, streams or even lakes (Excluding salt water). It is designed for use with water that is non-turbid, non-stagnant. It removes up to 99.99% of contaminants and pollutants found in fresh water supplies including Aesthetics 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.