At its core, the rule is a psychological game. It forces everyone to think twice about what they bring. It’s a giant social agreement: we all follow it so we can all fly safely.
Kind of like everyone agreeing to drive on the same side of the road—except with less honking and more tiny shampoo bottles.
So next time you’re squeezing your gel toothpaste into a 3.4-ounce tube, just smile. You’re not just packing; you’re playing a small, science-based role in air travel safety. And that’s kind of rad.
