My wife has put her facial serum in these bottles, and it has been a game changer for her. Earlier she used to pour the serum on her hand and rubbed on her face, which is time-consuming. She has to clean her hands each time after using her serum. Now, she does not do any of it; she just rolls the bottled serum on her face evenly, and that makes her life easier. The bottle quality, as well as the roller, is very good. It does not leak; she has to check it after keeping it in her bag while going to the office. The glass of the bottle does not have any bubbles, which makes it a quality product. I would say this is a winner for the price in the USA.