"Reverse Osmosis Tanks are constructed using the finest FDA approved materials available. The water storage chamber is assembled using a virgin polypropylene liner, high-grade Chlorobutyl diaphragm and patented stainless water connection. In addition, every diaphragm is post cured to remove any harmful materials or chemicals prior to assembly. This ensures tasteless, odorless, and contaminat free water, so you only get pure pristine water when filling your glass."