CBD oil is a hydrophobic (water-hating) buttery substance and is not water-soluble. Simply meaning, it is not able to dissolve and incorporate into water (like alcohol or sugar). Oily substances, like CBD oil or vinegar, are repelled by water which forces them to stay separated from it.
CBD oil, however, can be made compatible with water if it is put through nanoemulsions, allowing the CBD to blend with the mixture and hold long-term stability.
This form of CBD comprises molecules smaller than those found in liposomal CBD.
Nanoemulsions are today's best method of creating water-soluble CBD oil. These products are created by breaking up cannabis extract into 10-100 nanometer droplets.