An emulsion is a mixture of two or more fluids that are not naturally immiscible. Emulsions are often classified as colloidal dual-phase systems. Micro-emulsions and nano-emulsions are semi-transparent liquids as two particular types of emulsions, with the difference that nano-emulsions have droplets in the range of 100 nm. Liposomes are spherical vesicles, which include at least a lipid bilayer. They are potential drug carriers for a number of drugs, including old drugs with low molecular weight, protein therapies, and diagnostic agents. Liposomes are spontaneously dispersed by phospholipids in an aqueous medium. They are able to trap hydrophilic and hydrophilic compounds, prevent the decomposition of trapped compounds and release them at the target. Due to biocompatibility, biodegradability, low toxicity and the ability to trap hydrophilic and hydrophobic drugs, as well as to simplify drug delivery in specific tumor sites, liposomes have attracted considerable attention both as research systems and as commercial drug delivery systems.