Suitcases for air travel are either checked bags that are left with the airline, pre-screened and loaded on the plane, or carry-on baggage that the passenger keeps and must take through TSA screening. The TSA has specific requirements for items that are allowed in each type of suitcase, with the rules for checked luggage typically being more lenient.
Liquids packed in carry-on suitcases must all fit in a single quart-sized plastic bag and be 3.4 ounces or smaller, though medication, breast milk and formula are allowed in larger quantities that vary based on individual need. Cakes, pies and other food items are allowed to be packed in carry-on suitcases but may require additional screening, notes the TSA.
The TSA forbids certain items from being carried in either type of suitcase. Items that are prohibited include gun powder, explosives, flammable items and hazardous materials. In addition the the TSA requirements, many airlines have their own packing requirements and size restrictions for suitcases that passengers should be aware of before heading to the airport.
