What happens if my container is 3.5 ounces instead of 3.4?

It gets confiscated. TSA doesn't round down. The limit is strict. Even expensive products get tossed if the container is oversized.

Can I put multiple quart bags in my carry-on?

No. One quart-sized bag per passenger. If you need more toiletries, put them in checked luggage or buy solid alternatives.

Do I need to remove my liquids bag on international flights?

Rules vary by country but most follow similar limits. Remove your liquids bag at security checkpoints worldwide unless told otherwise. EU countries use the same 100ml limit. Some airports have newer scanners that don't require removal, but assume you'll need to take it out.

Are contact lens solution and eye drops considered liquids?

Yes, both count as liquids and must fit in your quart bag unless they're medically necessary in larger quantities. For medical necessity, declare them to TSA.

Can I freeze liquids to get around the rule?

No. If it can melt, it's a liquid. Frozen items that are completely solid when you reach security might pass, but they'll melt and you'll have a mess. Not worth trying.

What if I'm connecting and have duty-free liquids?

Keep duty-free purchases in the sealed bag with receipt visible. If you're connecting through a U.S. airport after an international flight, you'll go through security again and duty-free liquids will be confiscated unless they're in an approved tamper-evident bag.

How to Pack Liquids in Your Carry-On Without Breaking TSA Rules

Liquids in carry-on bags must follow the 3-1-1 rule: containers 3.4 ounces (100ml) or less, all fitting in 1 quart-sized clear plastic bag, 1 bag per passenger. Place the bag in an accessible spot since you'll remove it at security. Exceptions exist for medications, baby formula, and liquids purchased after security.

Get the right bag. Use a clear, quart-sized (roughly 7x8 inches or 20x20cm) resealable plastic bag. TSA provides bags at checkpoints but they're flimsy. Buy a pack of freezer bags before your trip or invest in a reusable toiletry bag that meets size requirements. One bag per person.
Check container sizes. Each container must hold 3.4 ounces (100ml) or less. The limit is container size, not how full it is. A half-full 6-ounce bottle will be confiscated. A full 3-ounce bottle is fine. Buy travel-sized products or transfer liquids into small refillable bottles.
Know what counts as a liquid. TSA considers these liquids: gels, creams, pastes, aerosols, and anything pourable. This includes toothpaste, shampoo, sunscreen, makeup, peanut butter, and yogurt. Solid deodorant is exempt. Gel deodorant is not. Lipstick is exempt. Lip gloss is not. When in doubt, treat it as a liquid.
Pack your liquids bag accessibly. Put your quart bag on top of your carry-on or in an outer pocket. You must remove it and place it in a separate bin at security. Don't bury it under clothes. At some airports you can leave it in your bag if using automated screening, but assume you'll need to remove it.
Pack exceptions separately. Medications, liquid baby formula, breast milk, and juice for small children are exempt from the 3-1-1 rule. Declare them to TSA officers at the checkpoint. They may test them. Keep these in a separate bag from your toiletries so you can easily show them.
Plan for after security. Once through security, you can buy liquids of any size and bring them on the plane. Fill your empty water bottle at a fountain. Buy full-sized drinks. Just keep your receipt if connecting through another checkpoint to prove you bought it in the secure area.

What happens if my container is 3.5 ounces instead of 3.4?: It gets confiscated. TSA doesn't round down. The limit is strict. Even expensive products get tossed if the container is oversized.
Can I put multiple quart bags in my carry-on?: No. One quart-sized bag per passenger. If you need more toiletries, put them in checked luggage or buy solid alternatives.
Do I need to remove my liquids bag on international flights?: Rules vary by country but most follow similar limits. Remove your liquids bag at security checkpoints worldwide unless told otherwise. EU countries use the same 100ml limit. Some airports have newer scanners that don't require removal, but assume you'll need to take it out.
Are contact lens solution and eye drops considered liquids?: Yes, both count as liquids and must fit in your quart bag unless they're medically necessary in larger quantities. For medical necessity, declare them to TSA.
Can I freeze liquids to get around the rule?: No. If it can melt, it's a liquid. Frozen items that are completely solid when you reach security might pass, but they'll melt and you'll have a mess. Not worth trying.
What if I'm connecting and have duty-free liquids?: Keep duty-free purchases in the sealed bag with receipt visible. If you're connecting through a U.S. airport after an international flight, you'll go through security again and duty-free liquids will be confiscated unless they're in an approved tamper-evident bag.