I have tried to get my wife and my friends into the mind-set of being prepared and with the exception of a couple of ex-boyscout types have had no luck. OTOH, if any of them borrow from my EDC then that item is their next gift on the next gift giving occasion. In this manner I have convinced my wife to carry a FAK, multi-tool, flashlight, whistle and water. ( in the bargain I no-longer find myself without my gear because it was left with the last person to borrow it.) Oddly enough the last thing that I lost in my wifes car because she borrowed it was my hair-brush. I have one of those that folds flat and fits nicely into a pocket - she had nothing.