Our Firework Diffuser looks like a frozen firework and will put any other diffuser to shame! A changing array of colors as its LED lights shift through 7 mesmerizing colors providing hours of selfless relaxation. Holds up to 1L of water that lasts 4-8 hours before Waterless Automatic Shut Off occurs, but you can set a 1-2hr timer. Feel free to add oils, and start with just a few drops. We definitely recommend peppermint, especially around winter time!