The definition has been expanded, and includes most foods, where the encapsulation of flavos is the most common. The technique of microencapsulation depends on the physical and chemical properties of the material to be encapsulated
Many microcapsules however bear little resemblance to these simple spheres. The core may be a crystal, a jagged adsorbent particle, an emulsion, a Pickering emulsion, a suspension of solids, or a suspension of smaller microcapsules. The microcapsule even may have multiple walls.