Benjamin, they already have one. Look at Leigh's post. Highway flare. There are even small ones available in some places. But a full sized one really doesn't take up that much space. Mine is vacuum sealed in a foodsaver bag. I can light it with one hand, so I doubt you'd have any trouble.
Not as exciting as inventing a new gizmo, I agree. But they're pretty idiot proof and they can serve multiple purposes.