Skulls can be crafted into a variety of utility items. They are created by dissecting a corpse. They can be worn as well (for some reason your skull is smaller than the skulls you find) for a +1 CON bonus. They also serve as a basic receptacle, and can store other things like gravel or water.
DMG: 2 (2 vs wall)
Armlet (carve a hole in the skull)
Flower Pot (skull + handful of dirt)