The 3-1-1 liquids rule is pretty simple: liquids, gels, and aerosols must be in containers of 3.4 ounces (100 milliliters) or less, and fit in a clear, quart-sized zip-top bag. That's right, folks, if you want to bring your favorite hair gel or face cream on board, it's got to be in a tiny container! And, don't even think about trying to sneak on a full-sized toothpaste... that's just not going to fly (pun intended).
Now, you might be thinking, "What about medications and special items?" Fear not, friends! The TSA has got you covered. You can bring medically necessary liquids and special items like breast milk and formula on board, but be sure to declare them at security and be prepared to answer some questions. It's all about being prepared and knowing the rules, folks!