What happens if I bring too much liquid on a plane?
Anything more will have to go in a checked bag or risk being tossed out. If your liquids are stored in containers larger than 3.4 ounces, even if there's only 3.4 ounces left inside the bottle, you can't bring them through security.
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Each passenger may carry liquids, gels and aerosols in travel-size containers that are 3.4 ounces or100 milliliters. Each passenger is limited to one quart-size bag of liquids, gels and aerosols.
Passengers are allowed up to one quart-sized bag per person, or roughly nine 3.4-ounce containers in a single quart-sized bag. Anything more will have to go in a checked bag or risk being tossed out.
According to the TSA, limiting containers to what can fit inside a quart-size bag prevents what former TSA administrator Kip Hawley once called a “critical diameter” to blow anything up. The size of the container precludes enough of a potentially explosive liquid from being carried on board.
Safety Razors: Because the razor blades are so easy to remove, safety razors are not permitted in your carry-on luggage with the blade. They're fine to pack in your carry-on without the blade. The blades must be stored in your checked luggage. The same applies for straight razors.
For example, classic stick deodorant doesn't have any limitations, so you're free to pack whatever size you want. Liquids and semi-liquids, on the other hand, are subject to restrictions. This includes many of the popular alternatives to stick deodorant: Roll-On Deodorants and Antiperspirants.
As stated in the TSA liquid regulation, it is the size of the container that counts, not the actual contents. A 125 ml tube of toothpaste that has been half used up is not permitted, but a full 100 ml tube is.
Are gels, creams, and other semi-fluid liquids counted, or are they exempt? The bottom line is that basically anything with moisture is considered a liquid and must abide by the 3-1-1 rule. Aerosol containers, like certain setting sprays, are also covered by this rule.
The TSA's “3-1-1 rule” clearly states that passengers can only travel with liquids, gels and aerosols in carry-on luggage in small containers that do not exceed 3.4 ounces (100 milliliters).
However, when packed in carry-on bags, makeup in a liquid, lotion, gel, paste or creamy form, must be in containers that are 3.4 ounces or less. You can take as many travel-sized liquids as you can comfortably fit into one quart-sized, zip-top bag. One liquids bag is allowed per passenger in carry-on bags.
According to the TSA, to carry sunscreen inside your cabin bags, it needs to be less than or equal to 100 ml/3.4 oz in volume. It is the same for any other liquid toiletries, such as perfumes and deodorant. This is known as the LAGs (Liquids, Aerosols and Gels) regulation, which was introduced by the TSA.
Because the TSA considers the nut spread a liquid, plane passengers must limit the amount they bring in their carry-ons. Like all other liquids, passengers are limited to 3.4 oz or less of peanut butter in their carry-on bag, but can also put the snack in their checked baggage.