If you need something to eat in an airport, there’s a bunch of snack options you can bring in. It’s not a movie theater. I’ve brought in Nuts, sandwiches, home baked bread wrapped in tinfoil. TSA just doesn’t want you bringing in the liquids. Am I going to get a warm meal with a drink on the side? No. Will I be full? Yes. Will is save $15. Yes. Will it take some planning and prep work? Yes.