Since I have not noted any advice on this subject, please let me offer a suggestion: use your training to figure out how much is appropriate to drink and then drink as much as you need and no more. If you are peeing on the bike then you are drinking too much. I recommend reading this article on Replenishment vs. replacement. http://www.hammernutrition.com/...T=Performance%20Tips
Here are a couple of the key points: the body has remarkably complex and efficient “built-in” survival safeguards that very capably deal with the difference between what it loses and what it can accept in replenishment. The various systems involved are complex, but the bottom line is that only a relatively small consumption will keep you going. On the other hand, over-consumption can easily throw the systems out of whack. As you read through our other fueling-related articles, you’ll see this principle applied repeatedly and further details given. It might seem like we’re banging the same drum all the time, but when it comes to fueling, we cannot emphasize enough that less is better than more. Rather than attempting to resolve your fueling requirements by replacing hourly loss with hourly intake, we suggest small doses, generally about a third of what is lost.
Many triathletes simply do not know. Anytime I see question like, "Pee on the bike or make a stop," I feel the need to interject that if you are peeing on the bike you are just plain drinking too much. I live where summer temps range up to 120 by the end of the ride and if I drink enough to asked have to stop for a break then my stomach is almost always going to be upset the rest of the day.
While you are at it, read the other performance tips on the Hammer site. They know what they are doing and I have gleaned a ton of good info from them over the years.