I reordered this product a few weeks ago because I wanted to give it a second try. The product contains 20ml - not that much but "normal" for an ampule. It smells similar to sanitizer (in my opinion) so it isn't that pleasant but fortunately the smell disappears quickly after absorbing. It is moisturizing and a bit sticky but I can't see any whitening effects although I use it every day. :( 1-2 drops of the product are enough for the face but although you don't need much of it, the ampule doesn't last long (4-6 weeks). I think it is an okay product but it isn't worth 20-25 USD - other brands offer better and even cheaper ampules.