Irons are easily oxidized in air and then produce rust. In making the production of iron bowl, in the process, usually in the surface layer of the alloy plated iron, iron to prevent direct contact with the air, to extend the duration of use of iron. Someone DIY ozone water and also use iron bowl to carry the ozone water, even if iron alloy surface has antioxidant ,but long time use or collision will destroy the shell ,and next contact with ozone water will make the water full of rust taste.So,carry ozone water’s iron bowl must be undamaged. Its best do not use iron bowl, iron bowl can consumption its life time.