Save up to 35% with Everywhere Cartridge Multipacks, powered by CoreXchange Technology™ for advanced, multi-layered filtration. Each filter uses a replaceable internal cartridge to reduce waste while targeting thousands of contaminants — from chlorine, lead, PFAS, and microplastics in tap water to bacteria, viruses, and microbial cysts like cryptosporidium and giardia in outdoor sources. Rigorously tested in the USA, these multipacks keep you prepared with clean, safe water wherever life takes you.