No matter how you like to mount your phone in the car, you can find a good deal on Amazon today. The 2-pack of Mpow magnetic vent mounts is probably the way to go for most people—you could keep the second in a travel bag for use in rental cars—but if you don’t like magnets, or blocking vents, there are other options available for you.
Source: Gizmodo – Choose From Three Different Smartphone Car Mounts For or Less