There is a common misconception among the "8 glasses a day" theory, which is that the 8 glasses does not have to be 8 physical glasses a day, the water can also be found in all the foods we eat. You do not have to drink 8 glasses of water throughout the day because drinking water is not the only way water is obtained.

Helpful, but... if it had an alarm (with personalized sound), it would be better

This widget is marginally useful if you are trying to keep up. I find a 16 oz cup on my desk to be a better prompter...

Ico is exactly correct, there is no such "study" or any peer reviewed work anywhere that provides evidence for the 8 glasses of water thing. Many medical professionals themselves repeat the "wives tale" but it is just that, at tale, with no supporting evidence.

Of course "dehydration == bad thing" but that is not in any way related to "8 water day" - you can drink beer and kool aid and absinthe and be perfectly hydrated (ok, maybe not absinthe ;)) - tha…ts a different matter than to equate 8 glasses of water a day with being "good for you" without any evidence of such. More

Actually, drinking water is a good thing for your body. My ob/gyn told me to get between 9 and 12 8oz glasses of fluids, preferably water and definitely not alcoholic, per day. At the very least, studies have shown that besides eating too little, not getting enough fluids can also trigger the body's "hoarding" mode (wherein your body thinks it needs to save anything) which makes it harder to keep a healthy weight. Plus there's that whole dehydration == bad thing.