2-PACK pH Replacement Filters for Seychelle pH2O 28oz Water Bottle. Dual-chambered filter pH20 with Alkaline pH Enhancing Filter AND Radiological Filter - pH2O Pure<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>2-PACK of Manufacturer's OEM Replacement Filters for the pH2O Pure Water Bottle by Seychelle</li><li>Increases the alkalinity (pH) of drinking water up to 9.5 pH with proven tested technology. Made in the U.S.A.</li><li>Removes up to 99.99% of toxic chemicals， contaminants， and pollutants. See list in product description below.</li><li>Can also be used with ANY 28oz Seychelle bottle (Extreme， Advanced， Standard， Radiological)， the 38/42oz. canteens AND the water pump (version 1). Completely interchangeable.</li><li>Filters radiation including Radioactive Iodine I-131 from a nuclear reactor or nuclear weapon. See full list below.</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41H%2Bi-aoFAL.jpg" noproxy>