This is the makeup brush cleaner, will help thoroughly clean through all the bristles and make cleaning your brushes. Very useful tool to cleaning various of your makeup brushes Compact in size and very cute,will fit easily in your makeup case. Grand new,made of high quality silicone,will not damage your brushes Smaller knobs on the top used for foaming and lathering, The grooves in the bottom of the egg are used to agitate the bristles