I can see how something like that might be useful if someone had some kind of medical emergency and was awaiting rescue, or if there was a roof fall and someone was the wrong side of it, but events like that are, thankfully very rare and I wonder if the contents would be in any fit state to use by the time anything actually happened.
When we were working down St Peter's mine rather than haul stuff in and out every trip, I thought a stash of food and a first aid kit, candles, lighter etc might be ok left underground, just in case anyone injured themselves and couldn't climb the shaft unaided.
I vacuum packed everything in plastic bags and put it all in a plastic box but the air down there was so moist that within a few months everything was damp even inside the vacuum bags.
If you did decide to install a few of these they would take some maintaining.
There are 10 types of people in the world.
Those that understand binary and those that do not!