Eco Friendly, ALFA1 GI Military Water Filter Canteen and ALFA1 Life Saver NANO Water Filter Bottle are designed and manufactured with the use of common advanced NANO filter cartridge technology and integrated bellows system to provide instant filtered fresh healthy water supply anytime anywhere. ALFA1 GI Military Water Filter Canteen is available in 1 & 2 Quart capacities in accordence with USDOD Military Specifications. Canteen is constructed of durable USFDA Grade composite plastic resins and materials with a unique screw-cap enclosure designed for positioning and retaining patented ALFA1 Life Saver NANO Cartridge System with secure threading and sealing with USFDA Silicone O-Rings/Gaskets. This allows dispensing the fresh filtered healthy water on demand anywhere anytime. Our patented ALFA1 Life Saver NANO Water Filter Cartridge is designed to provide fresh filtered, clean water free of contaminants up to 500 liters per Cartridge. This specially developed patented portable water purification system ensures an instant flow of freshly filtered healthy drinking water, free from suspended particles, chemical, impurities, bacteria, heavy metals, organic compounds, etc. without use of chemicals or power. Similarly ALFA1 Life Saver NANO Water Filter Bottle is designed and manufactured with common parts such as Cap Retainer Assembly and ALFA1 Life Saver NANO Water Filter Cartridge Assembly. Also it helps us to manufacture and provide same high quality product manufactured to military specifications at lower cost.