The Transportation Security Administration (TSA) has implemented a liquids rule to ensure the safety and security of all passengers. According to this rule, liquids, gels, and aerosols must be in containers that are 3.4 ounces (100 milliliters) or less.
These containers must be placed in a clear, quart-sized bag and presented separately at the security checkpoint. Each passenger is allowed one quart-sized bag of liquids, and the bag must be able to close properly.
It is important to note that the 3.4-ounce limit applies to the size of the container, not the amount of liquid inside. Even if your container is only partially full, it must still meet the 3.4-ounce requirement. Additionally, each passenger is only allowed one quart-sized bag, so make sure to prioritize your liquids and only pack what is necessary.