The 3:1:1 liquid rule is a security measure that limits the quantity of liquids, gels, and aerosols that passengers can bring in their carry-on luggage when flying. It is a standard requirement for all travelers departing from or within the United States, and it is also enforced internationally under the 100ml rule.
Understanding the 3-1-1 Rule
The 3:1:1 rule is designed to streamline airport security checks and reduce the risk of prohibited items entering airplanes. Here’s a breakdown of what each number represents:
| Number | Meaning | Description |
|---|---|---|
| 3 | 3.4 ounces (100 milliliters) or less | Each liquid container must hold 3.4 ounces (100 milliliters) or less. This limit applies to all liquids, gels, creams, pastes, and aerosols. |
| 1 | 1 quart-sized bag | All liquid containers must fit into a single, clear, quart-sized, resealable plastic bag. |
| 1 | 1 bag per passenger | Each passenger is allowed only one of these quart-sized bags containing their liquids. |
How to Pack Liquids According to the 3-1-1 Rule
Here are some practical tips for adhering to the 3:1:1 rule:
- Choose the Right Size: Purchase travel-sized containers for your liquids, or transfer larger products into smaller, compliant containers.
- Use a Clear Bag: Opt for a clear, quart-sized, resealable bag. You can usually find these in the travel section of most stores or online.
- Pack Smart: Arrange your liquid containers so that they fit comfortably inside the bag, and remember the bag must seal shut. Overstuffing the bag may result in you being asked to remove items.
- Declare at Security: Take out your clear bag of liquids from your carry-on bag before going through security. Place it in the provided bin for inspection.
- Exemptions: There are some exceptions to the 3:1:1 rule.
- Medically necessary liquids and infant formula are usually permitted in reasonable quantities. Be sure to declare these items separately to security personnel.
- Some items purchased at airport duty-free stores may be exempt after passing through security. However, it is always best to check with the specific airport and/or airline.
The 3:1:1 rule is a key component of airport security procedures. It ensures the safety of all passengers while allowing for some flexibility in bringing necessary liquid items on board. Remember to always check with your airline or airport for any specific updates to these rules, but in general, the 3-1-1 is the standard.
