The Nalgene OG Slim 24 oz bottle by Epic Water Filters is a durable, BPA/BPS-free hydration solution designed for both everyday use and outdoor adventures. It features an interchangeable filter system that includes two cartridges: one for tap water and another for outdoor or international water sources. The filters are NSF-certified to Standard 42, effectively reducing contaminants such as chlorine, lead, and PFAS. Each filter has a lifespan of approximately 3-4 months, equating to the replacement of over 550 single-use plastic bottles. The water bottle is leak-proof, easy to clean, and proudly made in the USA.