Originally Posted by alan29:
“How on earth do you milk soya beans?”
You soak dried beans in water until they swell, then under heat you grind them with more water, and filtre out the pulp. Then you season the resulting liquid (or not, it depends on who makes it) with things like salt, some sort of sweetner (like brown rice syrup) and flavourings - vanilla and chocolate being the most popular.
If you're really into it, you can buy a diy machine and make your own. Beans and water are much less expensive than premade, and you can tailor the milk to your needs and taste. You can also use the bean pulp to up the protein content in baked goods or soups and make other soy products like tofu.