Have you ever hear of a twist pillow? Its basically a long cylinder shaped pillow that you can twist and adjust to any shape. It is great for taking a nap anywhere such as in an airplane, bus, train, or even in the car. If your current pillow does not have enough neck support you can add this neck roll right into your pillow for instant alignment.
The Arc4life Memory foam twist pillow is 25.5" long and has a diameter of 4". A Very versatile pillow that works for kids in the car as well:
Check out this travel neck pillow for more information here: Arc4life Travel Twist Memory Foam Pillow