Aquamira Water Treatment effectively kills bacteria and enhances the taste of treated water. Unlike iodine or other treatments, Aquamira wont discolor your water and improves taste. Its no wonder why the CDC recommends using Chlorine Dioxide for treating water in the backcountry.Features : Kills odor causing bacteria and enhances the taste of stored potable water Treatment has a 4 year shelf life from manufacturing date Treats up to 30 gallons Easy to Use No Aftertaste Made in the USA