Nothing to do with costs; it's unhygenic. It would be allowed to take food out of the factory area and eat it in the canteen, which is exactly what they did on

Nothing to do with costs; it's unhygenic. It would be allowed to take food out of the factory area and eat it in the canteen, which is exactly what they did once a week or so. Returning from the canteen to the factory area required putting on different boots, clean overalls and a hairnet, then cleaning boots, arms and hands.