Complex liquids are materials that exhibit unique flow behaviors and properties, often due to their composition or structure. These liquids can include mixtures like suspensions, emulsions, and foams, which contain solid particles, droplets, or gas bubbles dispersed within a liquid. Their behavior can change under different conditions, such as temperature or shear stress, making them interesting for various applications. The study of complex liquids is important in fields like food science, cosmetics, and materials engineering. Understanding how these liquids behave helps in designing products with desired textures, stability, and performance. Researchers explore their properties to improve everyday items, from sauces to lotions.