Necessary for milk that doesn't come in a "box" form but in a pouch, for example, for the Hipp 600gr that we use, it was very convenient for us.

Nice container, for whatever you want to use it for.
I put the cream powder in it, in case I'm not at home, so I don't have to carry the whole box.

In theory, it is excellent, but in practice, it falls short. The clasp opens relatively easily, so I am constantly afraid of it spilling in my bag.
The measuring cup inside does not indicate how many ml it is.
The plastic inside for "cutting" the measuring cups is not stable, it comes out, so many times when you go to "cut" the cup, it comes out of its place and you end up with a mess of powder.
I do not recommend it.