The FAA limits the total amount of restricted medicinal and toiletry articles in checked baggage. The total aggregate quantity per person cannot exceed 2 kg (70 ounces) or 2 L (68 fluid ounces). The capacity of each container must not exceed 0.5 kg (18 ounces) or 500 ml (17 fluid ounces).

Yes, you can pack nail polish in your checked luggage, but there are specific safety and "spillage" considerations. Because nail polish is flammable, it is considered a "Consumer Commodity" or a "Limited Quantity" hazardous material. For checked bags, there is generally no limit on the number of bottles you can bring, as long as they are for personal use and the total volume doesn't exceed airline safety limits (usually 2kg or 2L total for all medicinal/toiletry items). However, the real risk in 2026 is pressure changes. The cargo hold undergoes significant pressure fluctuations that can cause the air inside a glass bottle to expand, potentially popping the cap or shattering the glass. To prevent a "manicure-colored disaster" on your clothes, always place each bottle in a leak-proof Ziploc bag and wrap it in bubble wrap. It is also wise to ensure the cap is tightened firmly but not so tight that the glass neck cracks. If you bring it in a carry-on, remember that it must fit within your one-quart clear bag and each bottle must be 3.4oz (100ml) or less.