I've lost count of how many bottles I've gone through already. At first, I only used the Blueberry line cream and foam cleanser, but the foam cleanser felt too greasy on my combination skin, so I switched to the Calamine Cleanser. I continued buying the cream because it is super moisturizing and hygienic in a tube. Then, when I saw that the toner was available in different sizes, I felt a sense of trust and bought the large size right from the start. You can buy empty bottles at Daiso and use it as a mist, for the "3-Skin" routine, as a wipe-off toner, or for any other skincare routine you can do with a toner. In particular, when I use my palms to massage it into my skin as the "3-Skin" routine, it leaves my skin feeling hydrated and comfortable without needing to apply anything else, and I can definitely feel my skin texture is more refined the next day. I get anxious as soon as it drops below half, so I stock up on a new one immediately.