Especially on hot rides I love ICE! I know that sounds very basic, but I've been on several this year that did not have ice I could add to bottles. They'd ice down the water/Gatorade you could use to refill your bottles, but that was cold for about the first five minutes and then would warm up. I'd actually stop at convenience stores and buy ice from the fountain machine so I could half fill my bottles (ice would melt before I reached the next rest stop).

My favorite ride stops have included watermelon. It was awesome, but then again, that was another hot day. I can live with just about anything on cooler days.