I'm reposting this tip just in case it's useful to anyone.

I have a thermos that fits in a bottle cage. I fill it with my morning coffee, since the other cage's bottle holds enough water for the morning ride.

Coming home in the PM on a day like today requires a lot more water.

First, I don't for get to pre-hydrate. Very, very important! Then I drink the water from the plastic bottle during the first part of the ride. About 15 minutes before I get home, I stop and open my thermos which now, instead of coffee, contains ice-cold water from the cooler at work.

Ice-cold spring water available near the end of a 95-degree, 75% humidity ride will, I promise, get you drunk.

RichC