Many studies are still being conducted into this deceivingly simple substance and even now it's properties are still being discovered. Water has been found to have a 'memory' and it's molecules cluster to form intricate geometries at the microscopic level. Tap water is horribly unhealthy not only because it is filled with chlorine, fluoride and other additives toxic to life and there are a great deal of impurities that not be removed. These include hormones from the contraceptive pill and HRT. In a recent study, more that 56 pharmaceutical drugs were found to be present in tap water including a cholesterol medication, the anti-convulsant carbamazepine, tranquilizers and mood stabilizers. Since the human body is composed mostly of water, it makes sense that we should use the best possible source we can access. Water pumped through metal pipes be that copper or lead and even ceramic is not a good solution for drinking water. Water in the natural world flows down streams, waterfalls and rivers. Some scientists believe that this movement not only helps to add natural minerals but also 'charges' the water in the Earth's natural magnetic field. This has been confirmed using cryogenic flash freezing of water and viewed using a dark field microscope. Those interested in this subject may wish to investigate the work of Victor Schauberger and Dr Masaru Emoto http://www.hado.net/watercrystals/index.php