Can you bring Eyeliner on a plane? As per the Transportation Security Administration's guidelines, passengers are indeed allowed to bring eyeliner on planes. However, it is important to understand the specific rules surrounding liquids and gels in carry-on luggage. Eyeliner falls under the category of liquid or gel cosmetics, which means it must adhere to the TSA's 3-1-1 rule. This rule states that all liquids and gels must be in containers no larger than 3.4 ounces (100 milliliters) and placed within a clear, quart-sized plastic bag for easy inspection at security checkpoints. Additionally, these items should be easily accessible for screening purposes.
