How to Pack Liquids Using the 3-1-1 Rule
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.
- 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.
- 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.
- 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.
- Pack strategically. Keep the quart bag easily accessible at the top of your carry-on. You'll need to remove it separately during screening.
- 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.
- 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.