* Carry-on: You can bring nail polish in your carry-on bag, but it must be in a container that is 3.4 ounces (100 ml) or less and fit in a quart-sized, clear, resealable bag.
* Checked baggage: You can also pack nail polish in your checked baggage, with no size restrictions.
* Some exceptions: There may be specific restrictions at certain airports or airlines. Always check with your airline or the airport for their specific policies before you travel.
Tip: To avoid potential issues, it's best to pack your nail polish in your carry-on bag so it's easily accessible during security checks.