Un-civilization - Butchering a Gemsbok in the Kalahari Desert with the Gikwe Bushpeople

"Next the two men removed the rumen, the first stomach of ruminant animals, where the grass they bolt hurriedly is kept in quantities to be coughed up and chewed thoroughly when the animal is lying in the shade.  Ukwane lifted the rumen out carefully, like a great water sack that might burst suddenly, and hurried with it to the pit lined with the skin.  There he slit it and water gushed out, every drop saved by the skin.  Ukwane and Gai removed handfuls of its contents, a yellow, pulpy mass of partially digested grass, and they squeezed each handful dry into bowls, tsama-melon rinds, and ostrich egg water containers that the women had brought forward.  They did not mind two great white worms that were discovered living in the rumen, for as soon as enough water was collected, the people all had a long, satisfying drink.  Some was pressed on me by Tsetchwe; I could not bring myself to drink it, but I did taste it and found that it was not too unpleasant, although it tasted strongly as intestines smell.  It was fresh, however, it was only the liquid from grass, and I thought that if I had no other water I too could drink the water of rumen."
From Elizabeth Marshall Thomas' The Harmless People about the ways of the Gikwe hunter-gatherers of the Kalahari who have no access to water for eight months out of the year.