Herbal distillates are made during the production of essential oils during the steaming process. This means that they contain small amounts of essential oils, but are much less concentrated and can be sprayed directly onto the skin. Herbal distillates contain water-soluble plant ingredients. Since they are often used in aromatherapy the distillates do not contain alcohol, which means that they are best used in a few weeks and in general should be used as quickly as possible.