Yes, you can put your makeup bag in your carry-on, but you must follow the TSA "3-1-1" rule for all liquids, gels, and creams. This means items like liquid foundation, mascara, lip gloss, and moisturizers must be in containers of 3.4 ounces (100 ml) or less and all fit inside a single, clear, quart-sized zip-top bag. Solid makeup, such as powder blush, eyeshadow, traditional lipstick, and pencils, can stay in your regular makeup bag without any size restrictions. A specific 2026 update: while there is no limit on powders, the TSA may require additional screening for containers larger than 12 oz (350 ml). To speed up security, many travelers keep their "liquids bag" at the top of their carry-on for easy removal, while keeping their dry brushes, sponges, and palettes neatly packed in a separate organizer inside the main suitcase.