When packing your carry-on bag for a flight, avoid bringing weapons, tools, large sports equipment or flammable material. You must also be careful when bringing liquids or gels with you on the plane, as they are only allowed in small amounts and you must store them properly.
The TSA rules for liquids, gels and creams follow the 3-1-1 format. Each container of liquids, gels, aerosols, creams or pastes can only hold 3.4 ounces or less, and you must place it in a 1-quart clear plastic zip-top bag. Each passenger is allowed to have one of these bags and must place it in the screening bin.
The TSA also prohibits any form of weapon in carry-ons, including guns, knives, hatchets, razors and swords. However, some self-defense sprays such as mace and pepper spray are allowed, provided they have a working safety mechanism, are less than 4 ounces and contain less than 2 percent tear gas. Many tools are also restricted, including hammers, saws, crowbars, drills and any tool longer than 7 inches.
Many pieces of sports equipment must be checked as well, such as hockey sticks, baseball bats, ski poles and golf clubs. Any flammable or explosive material is prohibited, with the exception of common lighters secured in a Department of Transportation-approved case.