Additionally, snack boxes, sandwiches (on select flights), and light snacks were available for purchase as part of a buy on board program.

Domestic service features a buy-on-board program with full meals available for purchase on flights of 3.5 hours or longer, while shorter flights offer snack boxes.

The snack box uses the Peltier effect, a system of charged semiconductors that get hot or cold, depending on how a current flows over them.

Sharperimage.com sells the snack box, with a one-year warranty, for $79.95.

"I have not heard any information that would corroborate a flight attendant trying to sell a snack box after that long."

The first week's selection was snack boxes for $3.

Both brand-name snack boxes and healthy organic meals were offered.

Flight attendants began selling snack boxes with items like hot sandwiches, chips and cookies for $3 to $5.

It will offer passengers the option of buying snack boxes for $3.

The original Fiddle Faddle box was the first snack box to feature a carrying handle.