Car charger for MacBook Pro (Retina, 15-inch, Mid 2015)?

I'm planning a long road trip, and am trying to figure out if there's a way to charge my MacBook Pro (Retina, 15-inch, Mid 2015) in the car. Do I need some sort of inverter or other fancy tech, or is there a charger that plugs directly into the car (or a USB port) on one end, and into the magsafe 2 port in my computer on the other end?

Thanks for the help!