I don’t think I’m the only one with this problem but I haven’t seen it discussed on any forum. I have to carry medical supplies were ever I go. I’ve got a Class B, and as always, space is limited. The supplies are relatively bulky, about the size of a shoe box, and they will not tolerate heat. 85 degrees is okay, but I climbed in after the van can been sitting in the sun four hours yesterday and the temp was 118. The fridge isn’t an option because it doesn’t work unless it's on generator or shore power. An ice chest is all I can think of, but adequate size chest would be pretty big. I might be able to mount it the rear luggage rack, but this is Texas, New Mexico and Arizona. Sitting back there in the sun would turn the ice into sloshing around water pretty fast. And these supplies can’t get wet either. Small 12 volt fridge? The ones I’ve seen have evaporator coils on the rear and I can’t believe they could be efficient in 118 degrees. So, what’s the most novel or least worst idea anyone can come up with?