ZeroWater On-The-Go 26oz. Filtered Tumbler Silver BPA-Free PURE-TASTING WATER ANYWHERE: You'll feel confident in your water quality wherever you are with ZeroWater's Tumbler. This on-the-go, personal water filtration system holds 26 oz. of cleaner, pure-tasting, filtered water using 5 stage filtering technology. 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.