The 3-1-1 rule has three different components to it, each corresponding to a number. The 3 refers to the amount of liquid you can have in a container, as it cannot exceed 3.4 ounces.

Despite the easy-to-remember 3-1-1 liquids rule, there are a few details that some travelers might feel are open to interpretation. Here’s more clarification about the TSA’s guidelines.

There are Transportation Security Administration size limits for liquids when it comes to what you can bring in your carry-on ...

From exemptions to the 3-1-1 rule to handy packing tips, get all the details on TSA liquid rules before zipping up your carry-on bag and heading to the airport.

You Need the 1-3-1 Rule Next time you face a major flight disruption, don’t let hopelessness take hold. Follow this simple formula to rebook—and maybe even walk away with a little cash.

The 3-1-1 rule has three different components to it, each corresponding to a number. The 3 refers to the amount of liquid you can have in a container, as it cannot exceed 3.4 ounces.