According to TSA rules, any free-flowing or viscous item, including liquids, aerosols, pastes, creams, and gels, is deemed a liquid. When it comes to makeup, liquid cosmetics include nail polish, perfume, moisturizers, eyeliner, foundation, and mascara. These items must be packed in a container with enough space for the full length of the shipper's label. If you are traveling by plane, your carry-on bag should be no larger than 33 x 22 x 10 inches or 1 x 101/4 x 2 feet. If it is larger, you will need to check it as a hold item. There are three types of liquids that you can bring on an airplane: Prescription medications, over-the-counter medications, and food products. Each type of medication must be packed in a separate sealed container so that each component is visible and identifiable. The TSA recommends packing liquids in these containers rather than in a purse or backpack because they are more likely to reach their destination in good condition. The number one reason that travelers lose their liquids is because they put them in their checked baggage. Even if your liquid is packaged properly, it can be lost or damaged during transport. To avoid this problem, please do not pack your liquid assets in your checked bags. You should also know that the TSA monitors air traffic for signs of contamination from liquids brought on board aircraft.