It's going to be 111 degrees today in the Phoenix-Metro area and I know that I have to run some work errands in the middle of the day. I wanted to carry some cold water with me, so I froze a bottle of water and strapped to the rear fender with a old bungee cord. As the ice melts the condensation will drip off the plastic rear fender. My seat stays dry and there is no chance of anything getting wet in my backpack.