in cross section these compartments look like a triangle with a curved back side. As you go "up" the back wall is creeping forward until the depth is zero at the top. So, 4" inches up from the bottom the depth has decreased to 7". At 6" up, the depth has decreased to 5-3/4". And so forth. Bottom line is, they don't have enough depth to hold squat, maybe a shoe box.
