The disclosure concerns encoding of information, such as content information for streaming, in a scalable manner. It is particularly suitable for resins used for rotomoulding applications. The second valve member for abutting against the second valve seat is disposed in the communication path to block the communication path, and the second urging device is provided for urging the second valve member toward the second valve seat. The jumper tube includes an inlet connected to the outlet of the first connector block and an outlet connected to the inlet of the second connector block. 50, wherein the core layer and the skin B layer contain a retardation-controlling agent having refractive index anisotropy and the difference between the refractive index anisotropy measured on one surface of the film and the refractive index anisotropy measured on the other surface thereof is at most 0.