Vacation strategies

[Sam]

How well does the Frio bag work?

Keeping insulin cool: earlier today, I was writing about an experiment on preparing for a hot weather, high humidity trip. I mentioned in passing that the Frio bag loses its effectiveness around 85% humidity, and @Sam challenged me to publish the actual numbers, so here goes! First, we should mention that a Frio bag only works if it is (a) totally wet, (b) not in direct sunlight, and (c ) able to freely evaporate to the atmosphere (i.e. not inside a bag). Here is an example of how a Frio bag mi…