The water treated with this bottle is chlorine-free, rich in zinc and alkaline in pH. Drinking water from this bottle will help to: -strengthen your immune system - eliminate excess free radicals from the body. - Having this quality of water in your body will help promote metabolism. - acting as an antioxidant, it cleanses our system of acidic and toxic waste caused by our diet. -eliminates chlorine and bad heavy metals. Double-layer vacuum wall : - High-tech thermal insulation, up to 6-8H. - Robust and durable: food-grade materials, no metallic aftertaste. - Healthy and environmentally friendly. -Top filter: It is composed of rigid monocrystals, anions, tourmalines that has a function to make alkaline water weak, create a negative potential and offers a high oxygen content. -Bottom filter: It is composed of pi-stone, KDF material, far infrared, which is rich in zinc, helps to stimulate the activity of small molecules, create anions, remove chlorine and bad heavy metals. Solid, permanently effective, no need to replace it.