For Videos please Google: DRINKSAFE-SYSTEMS. Filter and deep draw stalk for NEW Eco stainles water bottles Screw in cartridge system for Eco stainless filter bottles Can be used and stored due to patented filter anti bacteria system not available in other systems . Tested for contaminant removal to 1600 litres USA NSF protocol tests - Filters supplied to USA Dept. homeland security, Red Cross , peacekeeping forces. Over 2.5m filter sales worldwide - New to UK ECO bottle is no.1 USA bottle water filter seller Use from any tap river or lake - An excellent portable instant clean and safe water filter system - To use Fill bottle with water - Flip top spout and drink . Lasts for 1600 litres and tested for contaminant removal in USA . Filter tested UK Govt Environment Agency - National Laboratory Service - London School of hygiene and Tropical medicine . Worldwide tested Australia South Africa USA UK and others. Removes chemicals in water instantly including purification water taste , sediments , bacteria: E-Coli and occysts. Eco bottle is made of durable stainless steel - save a fortune in bought bottle water and enjoy filtered water for years . Inbuilt anti bacteria media allows use and storage - simply allow to air dry . Replaceable filter cartridges available. Patented filter offers protection for life of filter and features Auto shutdown when filter life reached .