The Dreambaby dehumidifying dry egg draws in moisture from the room and helps to remove excess moisture and dampness from the air. The dehumidifying dry egg requires no electricity or refills and changes from blue to pink when the egg is full of moisture. The dehumidifying egg can simply be put in the microwave to dry out and then can be used again. This is great for nurseries, bathrooms, laundry rooms and closets and reduces mould, mildew and other musty odours.