I don't care for cold drink while riding in hot temps. My bottles are uninsulated and just are whatever temp they are. I've always felt that cold water doesn't get absorbed as fast in your gut. I know it's a great way to cool down quick if you are in trouble heat wise. But I've so far been able to control how hot my body gets when working or exercising outside by other things.

Maybe it comes from learning to drink warm beer when a teenager after stacking hay bales during the summer. Never were enough ice machines nearby back then to fill a cooler with.