The interplay of space and void is a key aspect of the design process, giving rise to the concept of "cavity," which expresses volume, void, and the inner structure of space. Primarily used in anatomy and medicine, the dictionary definition of cavity refers to a hollow space within a body organ or tissue. In this sense, cavity can be interpreted as an empty space formed by the interaction of spatial forms—essentially, a new space created by overlapping shapes. In design, this term also plays a significant role, focusing on the internal structure of an object rather than its external contour, thereby creating innovative and aesthetic forms through the design of its inner structure.