A droplet made with two immiscible components is laid on a high viscous bath that is vertically shaken according to a sinusoidal motion. The droplet is composed by soapy water and oil. At the beginning, the water is completely surrounded by the oil that forms a shell. Each time that the droplet hits the bath, some oil of the shell enters into the water droplet. After about 50 bounces, the number of little oil droplets contained in the water droplet saturates and does not coalesce together. An emulsion is then obtained inside the water droplet.