Baby/ toddler travel neck pillows?

Are these safe? I assume they are but you never know :) . My one year old daughter’s head always seems to be in an awkward position when she falls asleep in her car seat. I would like to buy one but is there one you recommend or do you know if they are safe? Thanks!!! there is a link below if you are wondering what I am talking about

http://www.amazon.com/Noodlehead-Travel-Buddies-Neck-Pillow/dp/B000EOMSBQ