Home Appliances Design Serena Anti-gravity Humidifier by Mingxi Li Serena is a humidifier designed for modern homes. Serena creates the illusion of water droplets flowing upwards, against gravity. The effect is based on the principle of visual persistence, achieved by synchronizing a miniature water pump with the strobe of LED lights. The transparent shell has high light transmittance, which strengthens the visual effect. Serena measures 478 mm in height and 260 mm in diameter. A touch screen and a smart control panel allow the speed and brightness of the returning liquid to be set. Serena adds humidity to indoor air and also acts as a decorative object.