Okay – thanks for the info!

Thanks for directing me to that string, Housil! In that string it seems that most people were trying to activate the reaction with the snow itself. Did you try using liquid water (not frozen because stored against your body) to activate the reaction, and then melting the snow? Or are you saying that...

Hello, I do some winter mountaineering, and normally I have to carry 4-5 liters of water, despite the fact that I'm surrounded snow. I'll sometimes carry a stove to make water, but that's such a hassle that it's usually reserved for camping trips. Does anyone have any experience using the MRE heater...