When a person is flying, going through security can be one of the most time-intensive parts of the whole process. This is especially true for those who have a carry-on, since there are very strict rules about what is allowed in carry-on luggage. People who accidentally pack the wrong thing can end up having to throw out their belongings, go back to the check-in counter to check their luggage, or even getting arrested. Travellers can avoid hassle and inconvenience on their trips by leaving these items out of their luggage.

Liquids in Large Containers

TSA guidelines strictly regulate the amount of liquids any traveler can bring. People should not pack liquids that are in bottles over 3.4 ounces in size, and all bottles of liquid must fit in a single clear, quart-size, zip-top bag. This includes shampoos, soaps, drinks, makeup, snow globe souvenirs, and more. The only exceptions to the rules are food for children and essential medications.

Some Sharp Objects

The general rule of thumb is that any sharp object must have blades shorter than four inches. This means people may be able to bring nail clippers, disposable razors, and small scissors, but pocket knives and large scissors are not allowed. The exact size of allowable sharp objects varies by country, so travellers should always check the requirements for the nations that they are travelling to.


Most flammable items are not allowed in carry-ons or checked luggage. This includes aerosol insect spray, lighter fluid, gel candles, propane, fireworks, and more. However, most countries will allow people to bring small, personal handheld lighters, cigarettes, and cigars in their carry-on luggage.

Certain Sporting and Camping Gear

In keeping with the general rules against weaponry, items that can be used as a bludgeon must be checked. People cannot carry on things like baseball bats, hockey sticks, bowling pins, tent mallets, hammers, and other large, hefty items.

Self Defense Items

Most self defense items must be packed in checked luggage, not carry on items. This includes pepper spray, firearms, and ammunition. Keep in mind that items like nerf guns, toy guns, or water guns must also be checked, even though they are non-lethal.

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