Hey great article outlining important aspects of staying hydrated, but I would also think source of your water is very important too.

Reverse Osmosis water is very clean, absent of water treatment chemicals, There is very credible research done by harvard concluding that fluoride to cause significantly lower IQ's in affected children. and well within concentration levels found in many North American cities... If you check the mineral content analysis on bottled water it will have a value beside f ... 0 is best.

Be safe everyone and enjoy clean water!