Simple, safe & ergonomic: Lid perfectly fits 2.19" opening on your favorite Wide Mouth Series Sports Water Bottles. Keep your favorite Hydro Flask, Iron Flask, Hydro Cell or Yeti bottle while adding a world-class water filtration system. Nice for folks who are busy, active, and on-the-go. Finally, get peace of mind around your drinking water. BOTTLE NOT INCLUDED. Dual Filter Power for Every Adventure: Equipped with two unique filters—the EveryTap for daily tap water and the Everywhere with CoreXchange Technology for outdoor freshwater. Switch easily between them to adapt to your hydration needs, whether at home or on the go! EveryTap Filter (Blue) – Tap Water’s Best Friend: Reduces 70+ common tap water contaminants, including chlorine, heavy metals, and PFAS. Enjoy fresh, great-tasting water with every sip, without the unpleasant aftertastes. Perfect for your daily indoor hydration routine! Everywhere Filter (White) – Adventure-Ready: Take your water bottle from “sink to stream” with the Everywhere filter’s dual-layered CoreXchange Technology. Reduces 99.99% of contaminants from outdoor water sources. Designed for those who crave clean water wherever they wander! Compatible with wide mouth Hydro Flask 32oz & 40oz, Nalgene 24oz, 32oz & 40oz, Camelbak Chug 25oz, 32oz, 50oz, Yeti Yonder 25oz, 34oz, Iron °Flask 32oz & 40oz, Simple Modern 32oz & 40oz, Thermoflask 24oz, 32oz, 40oz, Hydro Cell 32oz, 40oz, and Takeya 32oz & 40oz bottles. American-Made Quality You Can Trust: Proudly designed and manufactured in the USA, our filters undergo rigorous testing to meet NSF/ANSI drinking water standards. Each filter replaces over 550 single-use plastic bottles, making it an eco-friendly choice for the conscious consumer.