Surprising Nest

This is a remix of two models I found on Thingiverse. The first one is the large half of a cube, which is the "Shapes inside shapes V2", and the second one is "kit Wallace 112 Geometric shapes", which I used to cut the center of the sphere in the middle. I call it a nest, because the inside of the sphere can hold something, and in this case is a smaller sphere.

Thingiverse does not allow me to remix two items at the same time, that is why I am attaching the link of the other work to give credit of legal purposes.
https://www.thingiverse.com/thing:3861654