You could have a mechanic bolt some hooks to the car that would serve that purpose. Most women carry nearly that much in their purse. Should you find yourself stuck in cold weather the recommendation is stay in the car and keep warm while you wait for help. Raising the hood is the recognized HELP signal. However, as I mentioned earlier, it may be a long wait, so please keep a sleeping bag and some candy bars in your car.
People freeze to death every year trying to walk for help in cold weather.
The human body simply cannot generate enough heat to stay ahead of the losses. The first symptom is uncontrolled shivering. If you find yourself in this condition, it is your last chance to do something about it. The next symptom is loss of brain function, at which point you lose the ability to think or help yourself. Now your only chance for survival is that someone will find you and warm you up before you cache it in.