Unopened cans are prohibited in carry-on bags at all U.S. airports

You cannot bring an unopened can of soda through TSA security in your carry-on bag, even if the seal has never been broken. TSA treats all liquids, gels, and aerosols the same way—the container size and whether it has been opened do not matter. A standard 12-ounce soda can exceeds the 3.4-ounce limit for liquids in carry-on luggage.

The rule applies to every beverage in a can or bottle: soda, juice, water, energy drinks, and iced coffee. TSA officers will confiscate the can at the security checkpoint if you try to bring it through. You will not get it back.

If you want to bring soda on your flight, you have two options: pack it in your checked bag, or buy it after you pass through security.

Key Takeaways

  • Unopened cans of soda are not allowed in carry-on bags because they exceed the 3.4-ounce liquid limit, regardless of whether the seal is intact.
  • TSA will confiscate any beverage in a can or bottle at the security checkpoint, and you cannot retrieve it afterward.
  • You can pack unopened cans in your checked baggage without restriction, as long as the airline allows it.
  • The fastest way to have a soda on your flight is to buy one after you clear security at the airport.
  • Some airlines charge for beverages on flights, so bringing your own in checked luggage can save money on longer trips.

Why the 3.4-ounce rule applies to sealed cans

TSA's liquid restriction exists for security screening purposes, not because of the contents themselves. The agency measures liquids by volume, not by whether a container is sealed. A 12-ounce soda can holds 12 ounces of liquid, which is more than three times the carry-on limit.

The seal on the can does not change this calculation. TSA officers cannot easily verify that a sealed can has not been tampered with during manufacturing or storage, so they treat all cans the same way. Opening the can at security to prove it is soda would defeat the purpose of bringing it on the plane.

Packing soda in your checked bag instead

Unopened cans are allowed in checked baggage with no restrictions on quantity or size. You can pack as many cans as your luggage weight limit allows. Make sure the cans are sealed and undamaged before you pack them, because TSA baggage screeners will open your bag if they suspect a leak.

Wrap cans individually in clothing or use a plastic bag to contain any spills if a can does leak during handling. Baggage handlers are not gentle, and pressure changes in the cargo hold can sometimes cause seals to fail. Placing cans in the center of your bag, surrounded by soft items like socks or towels, reduces the risk of damage.

Check your airline's baggage policy before you pack. Most airlines allow beverages in checked bags, but some have restrictions on certain types of drinks or on the total number of containers. Call the airline or check their website if you are unsure.

Buying soda after security

The easiest option for most travelers is to buy a soda after you pass through the security checkpoint. Every major airport has restaurants, cafes, and convenience stores in the terminal past security. You can bring that soda onto the plane without any restrictions.

Prices at airport shops are higher than at regular stores—expect to pay $4 to $7 for a single can or bottle. If you are traveling with a family or on a long trip, this cost adds up quickly. For a cross-country flight, buying soda after security might cost $20 or more for a small group.

Some airlines provide free beverages on flights, depending on the airline and the length of the flight. Check your airline's website or your booking confirmation to see what is included with your ticket.

International flights and different rules

If you are connecting through a U.S. airport on an international flight, the same TSA rules explore to your carry-on bag. You cannot bring an unopened soda through security, even if you are only in the U.S. for a connection.

Some countries have different liquid rules for their own airports. If you are flying out of a non-U.S. airport, check that country's security rules before you pack. The European Union, Canada, and other regions have similar but not identical restrictions.

What happens if you try to bring soda through security

If a TSA officer finds an unopened soda can in your carry-on bag, they will remove it and throw it away. You will not be charged a fee, but you will lose the soda. The officer may ask you to open your bag for inspection, but they will not delay you significantly unless they find other prohibited items.

If you forget about a soda in your bag and discover it after you have passed through security, you can still drink it on the plane. Once you are past the checkpoint, the liquid rules no longer explore.

Frequently Asked Questions

Can I bring a sealed water bottle through security?

No. Water bottles are treated the same as soda cans—any liquid in a container larger than 3.4 ounces is prohibited in carry-on bags. You can bring an empty water bottle through security and fill it at a water fountain or refill station after the checkpoint.

What if the soda can is smaller than 3.4 ounces?

TSA does not make cans smaller than 3.4 ounces, so this situation does not come up in practice. Even if one existed, it would need to be in a clear, quart-sized bag with other liquids, and most travelers would find it impractical.

Can I bring soda in a plastic bottle instead of a can?

No. The container type does not matter—TSA measures by volume. A 20-ounce plastic bottle of soda is also prohibited in carry-on bags, whether it is sealed or open.

Do I need to remove my soda from my checked bag at security?

No. Checked bags go through a separate screening process and are not subject to the 3.4-ounce liquid rule. You do not need to do anything special with beverages in checked luggage.

Can I bring soda on a domestic flight but not an international one?

The carry-on rule is the same for all flights departing from U.S. airports, whether domestic or international. You cannot bring unopened soda through security on either type of flight. You can pack it in checked baggage for any flight.