Eggs.

I was experimenting with transparent shaders and emission shaders when I liked the effect when 2 objects overlapped each other. I decided to color it as egg yolk and white as it suited the model. 

By instancing the model on a particle system on top of a cube I was able to get this render. 

Its a smoothed out and subdivided cube inside of another smooth and subdivided cube. The inner sphere has an emission shader while the outer cube has a glass material.