A recent scientific study shows that water is possibly not the most hydrating drink known to humankind. Still water finds itself in tenth place in a slightly disconcerting ranking, where competing for the rehydration top prize were coffee, tea, fruit juice, energy drinks, some fizzy drinks, and milk. Milk is well known among nomads the world over. Living, as they do, in extreme and rather rough conditions, they are perhaps the example of folk wisdom to follow, particularly in anything do with the art of using our resources in a world inclined more towards overconsumption and waste.
https://edition.cnn.com/2019/09/25/health/best-drinks-for-hydration-wellness/index.html