Re: Correct Time to Drink Water....Very Important...

 "Drinks containing concentrated nutrients, such as milk, sugar-sweetened soft drinks, and salty tomato-based juices, count more as food than drink since they themselves increase your body's water needs." -- N.Y. Times Guide to Personal Health

They should have also included caffeine containing beverages since caffeine is a diuretic and therefore contributes to dehydration.  Purified waters such as distilled and reverse osmosis waters are also diuretic and so should be avoided.  Mineralized waters, such as spring water are the best since they are better at hydrating the body and provide beneficial minerals to the body.