Brand from Japan: Okuchi. Okuchi means mouth in Japanese.Okuchi Lemon is an oral cleansing liquid that removes any dirt or any leftover substances and solidifies them. It also cleans proteins, one of the causes of bad breath.You can use it anywhere you want.Okuchi Lemon is so slim that you can carry it in your bags, pouches, and pockets.You do not need to carry heavy mouthwash bottles.For mouth care after eating.For people who does not have time to brush teeth.For daily dental care.How to use:Put Okuchi Lemon into your mouth and gargle for 20 seconds.Spit the liquid out.You can see the brown dirt with my eyes.Please be informed that the liquid may pop out of the package if you put too much pressure on the package when opening.