Gas Gauge Arrow
If you have a car, you should see a left or right arrow beside your gas gauge. It is there to tell you where the gas cap on the car is! You should already know where it is, but this is useful when you are driving a borrowed or rental car. This might not ring true if you have a car made before 2010, however.
Charcoal Purifies Air And Removes Odors
You can buy activated bamboo charcoal at a home goods store! Odors, allergens, and bacteria do not stand a chance against this. If you want to do that, you simply have to leave it inside mesh bags and put them in areas with terrible odors. It is that simple and nowhere near as expensive as an air purifier!