What Not to Pack in Your Carry On Bag? Ensure a hassle-free journey by steering clear of prohibited items in your carry-on bag. Skip liquids exceeding 100ml, sharp objects like scissors or knives, and flammable materials such as lighters or aerosol cans. Avoid packing these items to breeze through airport security and enjoy a stress-free travel experience. Remember to check airline regulations for specific restrictions before packing your carry-on.