FILTERED WATER BOTTLE: Our best-selling filtered water bottle. Built in the USA with medical-grade materials. Double-walled insulated stainless steel keeps your water cold for up to 24 hours. SETUP: For effective filtration, water must flow through the dense block of filtration media, forced through by gravity or by pressure. Drinking from the straw may feel like sipping a thick milkshake. ADVANCED AFFINITY FILTRATION TECHNOLOGY: Targets and removes up to 99.99% of 200+ contaminants, including fluoride, lead, and chlorine without targeting beneficial minerals. LONGER FILTER LIFE: Includes one 25-gallon filter – that lasts 2 months on average with just 3-4 refills a day. Replacing the filter is simple and available with convenient, reoccurring ordering through Clearly Filtered. TESTED & TRANSPARENT: Third-Party Independently tested to comply with NSF/ANSI standards 42, 53, 401 and 473. Fluoride, lead, and more were tested. Full data is available at Clearly Filtered. Some customers experience a slight salty taste at first - if it continues, rinse the filter upside down under cold water for 1 minute, then flip the filter upright and rinse for another for 30 seconds to clear any residue. Clearly Filtered Water Bottles are made in the USA from 100% BPA, BPS, and phthalate-free, medical-grade materials. With a silicone mouthpiece, filtering straw, easy-grip handle, sweat-free exterior, and water-tight lid, this bottle is designed for durability. The advanced filtration removes up to 99.9% of 220+ contaminants, including fluoride, lead, and chlorine, while preserving beneficial minerals. The double-wall insulated design keeps water cold for hours, making it ideal for sports, hiking, or daily hydration.