I seriously can't even count how many bottles I've emptied lol. Before the refills came out, I was already producing so many empty bottles that it was a hassle to dispose of them, and I felt kind of guilty towards the planet. I'm so glad the refills are out now ㅠㅠ I switched brands once in between, but I came back right away... I even stopped taking my dermatologist medication after using this...!! If you have severe acne, give this a try!!