Invigorated Water PH003 Alkaline Water Filter (3-pk) for pH Revive Water Bottle Brand new in packaging; never opened 100% BPA-Free Non-Toxic Sold Out on website and hard to find these! PH003 filter is lightweight, removes heavy metals, chlorine, and increases the pH of your water up to pH10 (results vary depending on your water source) Each PH003 filter lasts an incredible 39 gallons (1-2 months depending on use), so this handy 3-pack will last 3-6 months Provides great value including not one, but three, replacement filter cartridges, for use with Invigorated Water brand pH REVIVE Alkaline Water Bottle Long-life filter cartridges include 8 high quality filtration & purification materials Zeolite removes heavy metals, and some fluoride Diatomite ceramic balls add minerals such as calcium & zinc, while reducing fluoride High alkaline balls increase water pH level, making drinking water highly alkaline ORP balls reduce negative Oxidation Reduction Potential (ORP) Maifan stones re-mineralize water adding zinc, iron & calcium Negative ion ceramic balls improve smell & taste Made from best quality Tritan plastic to avoid plastic seeping into pH REVIVE filtered water BPA free More detailed photos can be found on Invigoratedwater.com