Somehow I imagined the shell otherwise. After coating on a ball about 10 long and 0.5 ca wide slot remains open through which the ball is geschobe into the envelope. So does not fully. Too bad that the colored cases reduce the colors of the balls. A white / transparent shell I had not found. I also feel that the shell of the dust and dirt (the so inside the apartment is) a little attracts. A shop in Cover works.
