Best travel pillow

My 22-year-old daughter used this Ralthy inflatable travel pillow ($17) to snag 9 hours of uninterrupted sleep on a recent flight to Singapore. You set the pillow on your meal tray or your lap and lean forward into it, placing your head in the hole, like you would on a massage chair. I just bought another so I can use it on an upcoming flight to Japan. — MF