The Hippo Deluxe is a steam humidifier, releasing sterile vapour in the air. With its easy-to-use, silent and safe design that features an integrated cooling system that cools the steam to around 50 degrees centigrade, the Hippo Deluxe is completely safe around the whole family. Once switched on the device can be left to run for up to 24 hours without having worry about refilling, and it can be filled with essential oils to add a touch of fragrance to the air.