Later, as technology advanced in the fifties and sixties, window was carried in dispensers we called "Window Boxes" with each containing window that jammed a particular frequency band. We'd station a chap outside, equipped with a dustbin lid borrowed from the flight hut, to catch them before they burst open. I once dropped two packets of window on OC Eng Wing who, being typically nosy, was attracted by the noise and wanted to see what it was. He ended up completely covered in a mass of very finely-cut X-band window and would have made a fabulous Xmas decoration for the Officers' Mess.