If you can get 90 percent of your caloric requirements from nice fresh celery you likely will never need to drink anything ... .

Of course a 3000 calorie per day diet would require you to eat about 200(?) pounds of celery per day.

You might not have to piss too often, but there's still sort of an "elimination" problem. And celery doesn't grow on trees, so you might have to go into the shipping busines to import enough.

John