In your carry-on bag, all liquids must be in containers that are 3.4 ounces or less, and all of the liquids must fit into a quart-size bag. Any allowed exceptions in quantities over 3.4 ounces must be declared to a TSA agent for inspection. Exceptions include baby formula, breast milk, necessary liquids for a person with a disability or medical condition, life-sustaining liquids, liquids used for cosmetic surgeries, and medications.
All checked baggage will be screened by the TSA. Weight limitations may apply; and if a checked bag exceeds these limits, an extra fee may occur. Limits also may exist on the number of bags you can check before a fee applies. Both weight limitations and the number of bags allowed are determined by the airline. The TSA prohibits a number of dangerous items to be in checked baggage such as: explosives (dynamite, realistic replicas of explosives, bombs and fireworks), flammable items (fuel, lighter fluid and aerosols), and/or disabling chemicals (liquid bleach, spray paint and chlorine for pools).
Use a lock that is TSA approved, so if a TSA agent has to search your bag he shouldn't have to break the lock. Film can be damaged by the equipment used to screen your bag. Be sure to put an ID tag on your luggage so that it can be identified in case it gets lost.
Check with individual airlines for dimension restrictions on carry-ons. Any luggage that is able to fit through the x-ray machine will be screened, however this does not mean that your carry-on will meet the requirements of the airline you are flying.
