ZeroWater Tumbler ZR-230 Travel Bottle Filters (2 Pack), White ZeroWater Portable Tumbler/Travel Bottle Replacement Filter, 2-Pack - ZR-230 Imported REPLACEMENT FILTER FOR ZEROWATER TUMBLER: You'll feel confident in your water quality wherever you are with ZeroWater's On-The-Go water filters. These replacement filters fit ZeroWater tumblers and have a display that lets you know when to replace them. FIVE STAGE WATER FILTRATION: Unlike many water filters & pitchers, ZeroWater filters use 5 stages of filtration, to bring you cleaner, better tasting water. Instead of carbon filtering only, our filters use Ion Exchange Technology to reduce contaminants. NOT AN ORDINARY WATER FILTER: ZeroWater filters filter water in 5 stages, are NSF certified to reduce lead and other heavy metals. Zerowater removes 99.6% of total dissolved solids, 2X more than the leading brand (tested by independent lab). GET MORE OUT OF YOUR WATER: Remove more impurities from your water with ZeroWater's unique, 5 stage filter system. With a variety of options, you can have cleaner water anywhere, from pitchers, bottle filtration systems, or portable on-the-go cup filters. ZEROWATER QUALITY: Some ZeroWater filters are compatible with other brands of water pitchers. Try switching to ZeroWater if you have used water filters or pitchers from Brita, Pur, Aquagear, Nakii, Waterdrop, Kenmore, Berkey, Fridgidaire, or Aquasana. 5-Stage Water Filtration Removes Virtually All Dissolved Solids for the Purest Tasting Water The Only Pour Through Water Filter Certified to Reduce Both Lead and Chromium Stage 1: Removes suspended solids such as dust and rust that make your water appear cloudy Stage 2: Removes additional suspended solids Stage 3: Removes organic contaminants; pesticides, herbicides, mercury, chlorine, chloramine, and stops bacteria from growing Stage 4: Removes inorganic compounds i.e. metals, nonmetals and radiological contaminants. Stage 5: Removes remaining suspended solids, holds the resin in place