im 43 a long time user the drinking of all this water/punch mix wasn't just for testing i cut out all soft drinks a month earlier to get healthier it the same drink mix my girlfriend has/is using in her weight loss program/regiment. I think since was drinking before daily that it may not look as diluted if had done like the past time which was 13yrs ago n was a much more heavy daily user.
Drinking fluids is only helpful on the day of the U/A. Drinking a bunch of fluids in the days or weeks before the U/A is of no help. For more info as to why, do a Forum Search with the terms "water soluble drinking useless".