sorry, maybe it is already explained...but I do not understand why we don't say ваш молоко ... but say ваше молоко... is молоко a neutr word and is this why we say it this way ? so there are 3 types ... ваш / ваше / ваша ...is this it ?
You're exactly right! Ваш is the masculine, ваше the neuter, and ваша the feminine pronoun. There is also ваши which is for all plural nouns.
Молоко is indeed a neuter word.