I will admit to never drinking plain water. I do however have more than the minimum amount of water, I just have it hot with sweeteners and with a dash of chocolate carton in it. if I was drinking water on it's own I'd be hard pressed to drink four pints in a day. I just hate it that much. And seeing as all pointers say I'm not dehydrated, it must be OK. I've had two pints already today. It wouldn't have happened if it was plain water.