Zazen Alkaline Water System with BPA-Free Plastic Bottom TankState of the art 10 stage filtration process BPA Free with Glass Bottom Tank option Includes all filters and stones ready to assemble The zazen Alkaline Water System features a 10 stage filtration process that transforms tap water into alkaline mineral water, effectively removing contaminants like chlorine and fluoride while preserving essential minerals. This eco friendly system requires no plumbing or electricity and hydrates at a cellular level,