How to keep yourself from freezing in stranded broken-down car in winter

With 32 degree F weather outside, the car without heat loses 10 + degrees every half hour. The candle heater model under prevents any loss of heat, rather with aluminium bubblewrap on your windows, it will gain heat even with no power in the car. The CO levels stay very low, but its a good idea to open a door and let some air in every now and then.

Lesson: keep the Grouf strainer heater +some tealight candles in your car with a lighter at all times, also keep a roll of aluminium bubble wrap, fits neatly under the seat especially when car-traveling in winter

How to convert any flame stove into a very effective heater for $1

First reading first column is CO, second is CO2