The watery liquid known as coconut water does not get into the coconut from outside. The water is produced by the coconut itself. Scientifically speaking, this water is the liquid endosperm. This endosperm surrounds and provides nutrition to the growing embryo, which in this case is the fruit. Simply put, the watery liquid supplies moisture to the seed. Initially, the coconut water or milk is fairly sweet and the copra (white fleshy part) is thin. As the seed matures, the liquid is converted into copra and the water reduces. Coconut water is nature’s way of helping the fruit grow healthy.