I got this stuff independent of birchbox..I actually have the entire line..it's the best!! I love the treatment solution.. At first I thought of it like a toner..but it's more than that! It gives me this amazing glow..and makes my skin feel brand new! I love how easy it glides on my face..and it makes applying moisturizer a breeze! Yes, it's pricey..but it's worth it and the bottle lasts forever!