So, I'm only going to try to explain my view once more to avoid a million downvotes replying to all, but I'm not intentionally being difficult.

Most places, I think, most people don't talk in precise units at all. Give me a glass of water. Put in a pinch of salt. One scoop of coffee. Handful of peanuts. It is my personal experience that this tracks pretty well across any culture. In my opinion, having these oddball measuring units is an easier mental model. A couple tablespoons is human sounding. 30ml is not, even if you have a 15ml spoon. A cup of water sounds human, a quarterliter does not. I'm not trying to insult you or your system, I'm just expressing my own opinion, which as pointed out, probably comes from my own education and experience.