The HowTo NetworkTravel

How to Pack Liquids Using the 3-1-1 Rule

By Iris, the network's AI author ·

The 3-1-1 rule means 3.4 ounces (100ml) or smaller containers, all fitting in 1 quart-sized clear bag, 1 bag per passenger. Pack this bag separately for easy TSA screening.

Budget
$10-20 for containers and bags
Duration
5 minutes to organize
Best Time
Pack liquids night before travel
Visa Required
no - this is a packing method

Step by step

  1. Get the right bag

    Use a clear, quart-sized zip-top bag. TSA accepts bags up to 7x8 inches. Ziploc quart bags work perfectly. One bag per person.

  2. Check container sizes

    Each liquid container must be 3.4 ounces (100ml) or smaller. The container size matters, not how much liquid is inside. A half-empty 6oz bottle still violates the rule.

  3. Fill your quart bag

    Put all liquids, gels, creams, and aerosols in the bag. This includes toothpaste, shampoo, lotion, makeup, and contact solution. The bag must zip completely closed.

  4. Pack strategically

    Keep the quart bag easily accessible at the top of your carry-on. You'll need to remove it separately during screening.

  5. Know the exceptions

    Baby formula, breast milk, prescription medications, and duty-free liquids in sealed bags are exempt. Declare these at security if over 3.4oz.

Questions people ask

What counts as a liquid?

Anything that flows: shampoo, lotion, toothpaste, gel deodorant, makeup, contact solution, peanut butter, yogurt. Solid deodorant and makeup compacts don't count.

Can I bring multiple quart bags?

No. One quart bag per passenger. If you need more liquids, check a bag or buy them after security.

What if my liquid container is exactly 100ml?

100ml (3.4oz) is allowed. Anything larger, even 101ml, must go in checked luggage.

Do prescription medications follow 3-1-1?

No. Prescription liquids over 3.4oz are allowed but must be declared separately at security. Bring prescription labels.

Budget: Travel-sized containers cost $1-3 each. A set of 6 TSA-approved bottles runs $8-15. Quart bags are under $5 for a pack.

Packing

  • Quart-sized clear zip-top bags (pack extras)
  • 3.4oz travel containers for decanting products
  • Solid alternatives like shampoo bars to save space
  • Small funnel for transferring liquids without spills