Is economical, convenient and easy to use. The system requires no electricity to provide reliable water filtration just about anywhere whether at home, office, vacation, camping or college dorm! Works with just about any water source including tap, lake, river, stream, pond and rain water. Each container is made from high quality 304 polished stainless steel for lasting durability and attractive appearance. This system is ideal for indoor/outdoor daily use and for emergency preparedness. Just grab it and go!