Selling milk to housewives in the mining community of Toquepala, Peru, we were reminded on several occations that milk had to be fresh and certainly less than twelve hours old. Sometimes farmers diluted the milk by adding water from the irrigation canal. Milk spoils quickly. The consequences were angry housewives shouting insults, returning spoiled milk to the truck and practically threw it in our faces. The fresh milk had to be kept in clean cans, the milk had to be kept cool until the truck picked it up early in the morning, and the milk cans had to be washed immediately after emptied. Cleanliness was so important.
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