The good thing about this gadget is it takes up little space, and for people who travel long distances particularly during the night, this is an essential gadget you need to have in your boot.
Introducing the Collapsible Solar-powered traffic cone. It costs $55 and it works with solar energy to lights the LED's inside the cone. If you are stuck on the road when the light is poor, place this cone a few feet behind your car. The LEDs flash and provide you and your car with a safe territory.
Otherwise, it can be tucked in somewhere in your car's boot.
Source - Red Ferret