This document discusses anhydrous and hydrous cosmetic formulations. It begins by explaining that anhydrous formulations contain only oil-soluble ingredients like oils, butters, and esters, with no water. It notes that antioxidants like vitamin E are often included in anhydrous formulations to extend shelf life. The document then discusses hydrous formulations, noting that water is the main ingredient in many products and is used to create emulsions with oils and thickeners. It provides details on the fatty acid compositions and properties of various oils, butters, and waxes commonly used in cosmetic formulations. It concludes with an activity suggesting testing the skin feel properties of these ingredients.