3m water purifier has always been a brand of water purifier that many friends like to use. The product quality of this water purifier is very good. The reverse osmosis membrane technology can filter out chlorine and impurities in tap water, and finally the water can reach the standard of raw drinking, and the minerals useful to human body in tap water are retained. In fact, there are many stores selling this water purifier now. I bought it on Comfort 1001 before, and the service quality is really good. Interested readers can rest assured to buy it.