Airline-Approved Beauty

What: Learning to pack TSA-approved sizes for air travel is a beauty must.

What the experts say: Frequent and not-even-very frequent fliers are painfully aware by now that all liquids, gels and aerosols taken aboard a plane must be in three-ounce containers or smaller, and must all fit inside a single quart-size Ziploc bag. Globetrotter and Vogue Beauty Director Sarah Brown writes,