Tim, this is exactly what I was looking for! Thanks! I live in Belgrade, Serbia, and these days temperature in my flat is about 26-29C degrees. I do have air conditioner but here we have very strange system for electricity billing. If I would use it 24/7, as I should to keep my insulin and Optipen on reasonable temp., my bills would go sky high. So this wallet is much cheaper and simple solution. Besides, I’m not much of a fan of AC system….