Like "I have one at home, and I carry one with me. Because I have "hypoglycemic unawareness", I can't tell by symtoms if my blood sugar is too low anymore. I have had to use mine a couple of times. When I was at work, I had one there, too. I typed out instructions for its' use and taped them to it, then made everyone around me aware of its' existence and the signs to watch for that I may need them to use it."