For optimal health and to keep your kidneys flushed and healthy it's recommended you try and drink at least 7 to 8 16 oz bottles of water per day.
But if that's not possible or you just don't want to drink 7 or 8 bottles of water per day you can get away with drinking only 2 to 4 16 oz bottles of water per day.
As long as you're drinking at least some plain water you can keep your kidneys healthy and prevent kidney disease and bladder infections.
You should drink some water even if you're not feeling thirsty.
But research has shown that you really do not have to drink 8 glasses or 8 bottles of water per day to stay healthy but of course if you drink more water you keep your body detoxed and help improve your health.