I failed to mention keeping fresh air in a vehicle. During El Nino in the San Ferndando Valley the Sepulveda basin flooded. It does this, as planned when that area was still largely agriculture. And everytime it floods people with no sense of history and just no sense drive through before it's closed and get stranded. This guy had a lovingly restored 1957 Chevy Nomad. And he lovingly drove it into the floodzone and got stuck. And he refused to leave his pride and joy. So he sat there with the windows up and engine running for warmth. And the exaust backed up from the water and he died of carbon monoxide poisoning. Heres another cheap,renewable emergency item. Pick up a couple newspapers and toss them inside. You now have ; additional insulating material ( crumple up and stuff inside clothing) fuel, fairly sanitary emergency bandaging material ( the inside pages)notepaper and reading material.