You will not buy this specific powder as a cosmetic. Do not expect it to do the job like cosmetics. Not to mention, it is excessively white to use as a cosmetic, you will look like a ghost (unless you also have very fair skin). I bought it for acne, and personally, I have used it as clay (as a mask, I applied it on damp face after washing) and as regular powder (after my last cream). It dried out my pimples to a very satisfactory degree. Indeed, it remains matte for as long as I wear it. I have not tried it under makeup to see how it would react, so I have no opinion on that. The packaging is indeed a very small container, but it really doesn't need much to apply, so I want to believe it will last.

Suitable powder for light to very oily skin. I apply it every morning over sunscreen to keep me matte all day and it actually does. It doesn't clog my pores (which is a big problem, that's why I didn't use any powders until now). Very comfortable feeling and doesn't bother at all. It requires a very small amount, so the packaging will last for a long time...