I'm putting together a home-made emergency kit for my car. I live in a part of the country that gets very cold in winter and hot in summer, so I'm concerned about the "shelf life" of the items in the kit, things like adhesives (duct tape, Bandaids) and plastics (poncho, tarp/groundsheet) etc. I haven't chosen to include any meds, but they would also be effected by temp extremes. The emergency candle is probably out. It would be a puddle after one summer day.

Anyone have any ideas about how often these things should be replaced?

Thanks -

DFW