LifeStraw Go Water Filter Bottles with 2-Stage Integrated Filter Straw for Hiking, Backpacking, and Travel 23-ounce water bottle with integrated replaceable LifeStraw filters up to 264 gallons (1,000 liters) of water down to 0.2 Microns Leak-proof bottle made of BPA-free Tritan can be re-used indefinitely, simply purchase a replacement filter when the filter has reached capacity Surpasses EPA standards for removing E. Coli, Giardia and Cryptosporidium oocysts, and many other waterborne contaminants Removes 99.9999% of Waterborne bacteria (&gt; log 6 reduction), removes 99.9% of Waterborne protozoan Parasites (&gt;log 3 reduction) Zero aftertaste, no chemicals or iodine, food-grade flexible silicone mouthpiece is removable for easy cleaning