The Contigo Replacement Filter 2 Cartridges is designed specifically for use with Wells Water Bottles. With a filter life of 60 gallons or 3-5 months, this filter ensures clean and safe drinking water while on the go. Made by the trusted brand Contigo, these cartridges provide reliable filtration for your outdoor adventures, camping trips, or hiking excursions. Stay hydrated and confident in the quality of your water with these convenient and easy-to-use filter cartridges.