The brush egg is made of hard silicone and fits snugly into the palm of your hand.
Use this accessory to wash your brushes and clean them all the way to the base of the hair. Swirl the wet, shampooed brush in circular movements over the ridges of the egg to get all the makeup removed. You can also hook the base of the brush onto the ridges and wiggle the brush to remove embedded dirt. Smaller brushes can be pressed on the little nubs to remove eyeshadow or liquid eyeliner.
When you are finished and your makeup brushes are sparkling, just rinse the egg under clean water and let it dry away from direct sunlight.
Voila! The cleanest makeup brushes in all the lands!