Nairobi, May 30 -- You reached for your third coffee in the morning before drinking a single glass of water. It has been nearly four hours since your last bathroom break. A mild headache is creeping in, but you are blaming it on Monday meetings. Sound familiar?

If you work in an office, spend hours in traffic or sit most of the day in an air-conditioned building, there is a good chance you are not drinking enough water and may not even realise it.

A snap poll of urban workers showed just how widespread the problem is. Asked how many glasses of water they drink on a typical workday, 48 percent said between zero and five glasses, while 22 percent said they simply do not keep track.

Plain water ranked only third among drinks consumed duri...