Well, they are calling for rain on Friday. So, if I get the rear mounted water bottle holder, I won't be able to test it out.

I also realized that I will probably have to give up my tool kit bag under the seat for the rear mounted water bottle holder. I refuse to do that. I have 650 CC wheels. If I don't carry tubes, it's unlikely that anyone else will have one for me.

I could get the water bottle holder tool kit holder... and put that on my bike. Although, I will probably have to place it where I want to put the water bottle that I grab on a regular basis.

So, I think I'm back to the Camelbak. It will be annoying, but water will be easy to get and I will be more likely to drink.