There is no reliable way of transporting frozen pizza, ice cream, frozen anything on the plane. Delays, sitting in the sun in a luggage truck on the tarmac, opening and not so secure resealing by TSA etc. can lead to more rapid melting.

The best bet is to use lots of cooling gels or packs, and also seal with tape all the way around where the lid meets the picnic basket body.

If you order frozen meat or pizza from a company that specializes in shipping that, the company assumes responsible for safe delivery or your money back.

Food handling tips:
http://members.aol.com/ajaynejr/food.htm

It is a little known fact that a solidly frozen material that is liquid at higher temperatures has a lot more cooling power than a liquid material with a similar melting point even though the liquid material is currently at a slightly lower temperature. If you use those "blue ice" or similar picnic basket cooling packs, these should be frozen solid before use.

The advantage of these blue or gel or whatever packs that are "colder than ice" is that the interior of a well insulated picnic basket tends to stay just a few degrees above the melting point of the material. So the coldest that packages of plain ice can keep the food is 33 degrees and the food itself may thaw first. However the packs are useless if your home freezer isn't strong enough to freeze them solid.

After the material in the packs has melted, the temperature inside the picnic basket will rise rapidly and the food will start to thaw faster.

[This message has been edited by AllanJ (edited Dec 12, 2003).]

[This message has been edited by AllanJ (edited Dec 12, 2003).]