Ondine AQUAS Brand new, unused. Simply add it to tap water to create high-concentration silicon and hydrogen water. Instructions for use are written on the back of the box. Hydrogen and silica elution, fluoride removal, Antibacterial effect by silver ions Performance: Production of high-concentration silicon and hydrogen in tap water, Chlorine, fluorine, and sterilization/disinfection. Contents: 17g Body material: PP (polypropylene) Materials used: Hydrogen reduction ceramics, silica elution ceramics, Ag antibacterial ceramics, zeolite ceramics, platinum ceramics, fluorine adsorption ceramics - Brand: Aquas - Product name: Ondine Aquas Yu-packet post mini, anonymous shipping I am also listing various other items. I am also selling on other flea market sites, so I will remove the listing if it sells out.