With BRITA’s Active water filter bottles, you can be assured that your drinking water has undergone superior filtration, so you have access to fresh filtered water when you are on the go. BRITA’s Microdisc filtration filters out chlorine, trace impurities such as certain pesticides*, while maintaining key minerals such as calcium and magnesium in your drinking water. It’s simple, fill your BRITA bottle with tap water, and the water is instantly filtered on its way out!