BWT bestmin PREMIUM M is a worldwide unique filter system for water optimization in gastronomy. This filter not only removes unwanted components such as particles, flavors and odors as well as chlorine from the raw water, thanks to its special mineralization unit it also refines raw water low in minerals into fine-mineral gourmet water. The BWT technology ensures that the filter releases minerals such as magnesium to the water, which has been specially optimized for hot drinks.