The Lot of 3 Contigo Wells Water Bottle Replacement Filter Cartridge 2-Pack 1217724 is a set of water filter cartridges specifically designed for the Contigo brand water bottles. These cartridges are essential for keeping your water clean and safe to drink while on the go. With the easy-to-install design, you can ensure that your water stays fresh and healthy to drink during outdoor activities, camping trips, or hiking adventures. This product is a convenient solution for maintaining clean and potable water whenever you need it.