Mouthwashes our parents fought more or less bad breath and had no lethal effect on the bacteria causing plaque (some even favored their development!). This is no longer the case: in particular, zinc is actually effective use against the formation of plaque (look "Human Oral retention of zinc from zinc salts Containing mouthwashes and Its relevance to dental plaque control" on Google for example).
This alcohol-free mouthwash has a pleasant taste and does not dry the mouth. Perfect in the office if you can not easily brush your teeth at noon.