21: Keep Your Lunch Warm
One of the worst things about living in a cold climate is that it can be hard to keep your lunch warm when you’re car is parked at work. Even the best lunch box won’t protect your food from the elements after a certain amount of time. So how do you keep your lunch warm and still enjoy the benefits of your car (via Family Handyman)?

If you have a car with seat warmers built-in you have a solution for heating food that you might not have realized. Simply place the food on the seat warmer and turn it on for a few minutes. You have a way to slowly heat your food up that is remarkably safe and will save you money in the long run.