This is an authentic product purchased at a salon in April 2024. I used it for about six months. 【Remaining amount is unknown.】 The eyelash technician said that there's still a lot left, even after using it for six months, and I can visually confirm that there's liquid on the brush tip. Please refrain from purchasing if you are concerned about scratches or stains, as it was kept in a makeup pouch. The original price was 11,000 yen.