this invention relates to packing methods and materials for packing electrolytic capacitors and the like . this invention provides packing methods whereby capacitors are held in a container tray with a good order and with no rotational movement of capacitor and packing materials wherein packing of electrolytic capacitors solves the problem of capacitor rotation and allows the capacitors to be easily taken out of the container tray . according to this invention , an electrolytic capacitor loaded container tray is taken out of a receptacle and the electrolytic capacitors held in the container tray in an orderly manner can be smoothly picked up for automatic mounting on printed wiring boards .