If you are wondering can you carry on nail polish on a plane, it is important to understand TSA liquid restrictions before packing. Nail polish is classified as a liquid and contains flammable substances, which means it must comply with the TSA 3-1-1 rule. Each bottle must be 3.4 oz (100 ml) or less and placed inside a clear, quart-size liquids bag. Only one such bag is allowed per passenger. Knowing these guidelines in advance helps travelers avoid delays, confiscation, or last-minute disposal at security checkpoints.
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