The Inflatable Car Jack is the king of all jacks, specially in terms of portability. It's made from super strong materials to provide support to lift your car up when you need to change a tire. The idea seems ridiculous at first, until you realize the brilliance of it. Metal jacks don't quite work as they should in sandy or muddy terrain, so this is a worthwhile alternative.
Just connect the hose to the car's exhaust and rev your engine to fill it up. When you've reached the desire height, rev the engine again to get out of that hole after changing your tire.
Get It: $255+