All my traveling has been road trips ( in the car) with my babies. (Hoping to travel to Germany with a couple for shows next year ) If I go they go.... I usually don't feed four hours before we are leaving., and that is the ones that get car sick...but I do give them a little nutra-cal just to make sure their sugar levels don't get low. This is about the only time I ever have to use it. But the ice and liners are miracles.