I read that thread! (Which is probably where this reply will belong.)
Interestingly, we’ve used them extensively in Asia and India (very humid) and they’ve been fine. My guess is they technically haven’t been fine, and the high end of the insulin safety temperature rating is probably padded substantially, thus allowing the insulin that’s been kept cool but not cold to continue to work. (This is all personally gathered empirical evidence of course.)
EH isn’t as concerned about the high temperature issues as maybe he should be. His daily use Humalog lives in his pocket or his man purse (gah, can we have a thread about rad small man bags?!? Because we’ve traveled the world and tried to find the perfect thing, and it doesn’t exist.) Anyhow, the insulin is probably exposed to temperatures higher than 86° as we’ve walked from the car to the parking lot, down the street in Vegas, in our un-air conditioned house, or around town when it’s in the high 80’s etc. (thanks, global warming). He wouldn’t ever leave it in a hot car, and we’ve been pretty specific on a recent trip when we had to store our luggage (in Bali which is really hot) that it had to be kept in an air conditioned room.
I’m not suggesting to anyone that they try this at home, on themselves or their children. But we’ve found that the heat hasn’t been as big of an issue as we initially thought it would be. And the thing I love about that fact is that we’ve still been able to travel for a month at a time, hike, and do some crazy stuff that we probably wouldn’t have done if we’d been totally afraid of the temp issue.
I loved reading about your thermos solution (on that other thread) and will keep it in mind for extended outdoor in the heat travel. The issue for me always comes back to “how do I freeze that ice again?”
Also, I’ve wondered about portable refrigerators for the on-the-road purpose (when it’s a billion degrees IN the car and there’s no hotel or shop selling ice in sight, for instance) (although they are stupidly expensive, and some are flakey).