COLOR CHANGING AROMA DIFFUSER Add water and a few drops of your favorite essential oil to the Cupcake diffuser and let the relaxation begin. Cupcake changes colors as it mists to add to the ambiance. Auto shut-off. Cupcake’s compact size makes it perfect for travel too. USB and wall adapter included. 4”H x 5”W. Try our Essential Oil Trio with Lavender to help you unwind, Sweet Orange to energize, and Eucalyptus to help you breathe more easily. .3 fl. oz.