There are a couple of reasons for this decision.
The most important being the quality of the water going into the 500ml Bottle is of paramount importance! It’s like the old saying “Garbage in, Garbage out!” In other words, putting municipal tap water or bottled mineral water (Low quality/High TDS) containing 18-24000 dioxins, zeno-oestrogens & estrodials & many other carcinogens, serves only to deliver those proven contaminants directly into your cells even faster in the presence of Hydrogen!