Don't want to be the one responsible for your next flight to be diverted due to a stinky spill? Consider packing Avon's Nail Enamel Remover Wipes ($5) instead. Or pick up a small bottle at the drugstore when you reach your destination — it's cheap. Another option is simply to stop in a salon for a quick polish removal and touch-up service.
But if you must pack nail polish remover on your carry-on, first follow TSA's 3-1-1 policy. After twisting the cap tightly, tape to the bottle to secure. Then you're cleared for takeoff.