New Plane Rules? Check.

By now, most travelers know they can't bring water, body lotion or shampoo through airport security, but what about contact lens solution, stored breast milk or pills in unmarked containers?

The devil is apparently in the details, as travelers struggle to understand the nuances of the new Transportation Security Administration rules governing what can and can't be brought onboard. It's an evolving scene, so check the info sources link on the right for the latest changes. But no matter what the rules state, there is bound to be some confusion. Our advice? Be patient.

We've fielded many reader queries in recent days. Here are responses to some common questions (information was valid at press time).

Q. I'm nursing and need to take my breast pump while I am away and need to transport the milk back with me. While you can transport small amounts of breast milk and baby formula for consumption on the plane, are there rules for transporting several bottles packed in dry ice?

Patricia L. Turner, Baltimore

A. I'm afraid you're going to have to check your breast milk. New TSA rules state: "Baby formula and breast milk are allowed in your carry-on baggage or personal items. You can take these through the security checkpoints and aboard your plane. However, you must be traveling with a baby or toddler. All items including formula or breast milk will be inspected. . . . Liquids and gels, including baby formula or breast milk, may be packed in your luggage and checked with your airline. You are encouraged to travel with only as much formula or breast milk needed to reach your destination."

Most airlines allow dry ice to be checked. On United, for example, up to 4.4 pounds per person of dry ice can be checked, provided it is packaged in a way that carbon dioxide can be released and that it is not sealed in a plastic bag.

What are the rules on cameras? Any difference between rules for film vs. digital?

Bob Kerns, Spotsylvania, Va.

The rules regarding cameras have not changed. You are allowed to bring camera equipment in your carry-ons. Go to http://www.tsa.gov/summer/film.htm for details.

To save space I put my pills in two small, clear, plastic boxes with dividers. Does the requirement that all medications in carry-on luggage be labeled apply just to liquids and gels?

Bill Robertson, Fairfax