After all the discussions about heat and camelbaks, I gave in. I did a search for threads on camelbak, then headed to the store. I was able to hold a semi-intelligent conversation with the salesman and came home with an Aurora (Dream is sold out everywhere. May be a new model coming).

Promptly rinsed it, filled it 1/3 full and put it in the freezer. I drank twice as much as I normally would have on a 1:30 ride this morning. It was already in the 80's.

SO THANKS YOU GUYS! You make me sound smart.

PS. The high in St. Louis today will be 96 with a heat index of 110 and our air conditioner just died . Hope everyone else stays cool.