👉 "Cube C", as defined in Cubo, Cube and Cube, is a type of square pyramid. It has six identical smaller cubes on its base and four additional small cubes at each vertex to form the top surface. Cubocubes are often used for building models or constructing 3D structures with a uniform density. They can also be used as structural components in buildings and other structures that require a uniform material throughout their construction process.