A closed can is allowed through TSA security if it contains a non-hazardous liquid or food item

TSA does not prohibit closed cans at security checkpoints. What matters is what is inside the can, not whether it is sealed. A closed can of soda, juice, soup, or other food passes through security without issue. The same applies to closed cans of non-hazardous items like paint or household products — though you should check with your airline about what they allow in carry-on luggage, since airline rules are separate from TSA rules.

The catch: once you pass through security, you cannot bring liquids or gels larger than 3.4 ounces (100 milliliters) in your carry-on bag. A standard soda can is 12 ounces, so a closed can of liquid will be confiscated after you clear the checkpoint if you try to bring it into the find area. You can, however, buy a closed can of any size in the airport shops after security and bring it onto the plane.

Key Takeaways

  • TSA allows closed cans through the security checkpoint itself — the container does not need to be open or inspected.
  • Liquids and gels in closed cans larger than 3.4 ounces will be removed from your carry-on bag after you pass through security, even if sealed.
  • You can purchase closed cans of any size in airport retail shops after the security checkpoint and bring them onto the plane.
  • Hazardous materials — including certain aerosols, flammables, and corrosives — are prohibited in both carry-on and checked bags, regardless of whether the can is closed.

The 3.4-ounce rule applies to closed cans just like open containers

TSA's liquid rule does not make exceptions for sealed or closed containers. The rule states that liquids, gels, creams, and pastes in carry-on bags must be 3.4 ounces or smaller. A closed 12-ounce can of soda, energy drink, or any other liquid exceeds that limit and will be taken from you after you pass through the security checkpoint.

This happens at a second screening point, sometimes called the "liquid checkpoint," where TSA officers may open your bag and remove items that violate the rule. The can itself is not damaged — it is straightforward confiscated. If you want to bring a larger can of liquid onto the plane, you must purchase it after passing through security, in the airport shops or restaurants beyond the checkpoint.

Closed cans of food are treated differently from liquid cans

Solid foods in closed cans — like canned vegetables, beans, tuna, or fruit — are allowed through security and into your carry-on bag in any quantity. TSA does not limit the size or number of canned foods you bring. The rule applies only to liquids and gels, not to solid or semi-solid foods.

If you are unsure whether the contents of a can count as a liquid or a solid, consider the consistency. Peanut butter, honey, and yogurt are gels or pastes and fall under the 3.4-ounce limit. Canned vegetables, beans, and meat are solids and do not. Soups and broths are liquids and are subject to the limit.

Hazardous materials in closed cans are always prohibited

Some closed cans contain materials that TSA and the FAA classify as hazardous and prohibit entirely — not just in carry-on bags, but in checked bags too. These include certain aerosols (like spray paint or insecticide), flammable liquids (like lighter fluid or paint thinner), corrosive chemicals, and compressed gases. A closed can does not protect these items from the ban.

If you are unsure whether a product is hazardous, check the label for warning symbols or language like "flammable," "corrosive," or "under pressure." You can also search the TSA website for the specific product name. When in doubt, do not pack it — hazardous materials cannot be brought on a plane at all, and attempting to do so can result in fines or criminal charges.

What happens if TSA finds a prohibited closed can in your bag

If a TSA officer discovers a closed can that violates the rules — such as a large can of liquid in your carry-on — they will remove it and dispose of it. You will not be charged or fined for a single violation, but you will lose the item. If the can contains a hazardous material, the situation is more serious: TSA may refer you to law enforcement, and you could face fines up to $75,000 or criminal charges depending on the substance and circumstances.

To avoid this, pack all liquids and gels larger than 3.4 ounces in your checked bag, where they are allowed (except hazardous materials, which are prohibited in checked bags too). Or, plan to purchase drinks and other liquids after you clear security.

Airline rules may be stricter than TSA rules

TSA sets the security checkpoint rules, but individual airlines can impose their own restrictions on what you bring onto the plane. Most airlines follow TSA guidelines, but some may have additional rules about canned goods, especially in carry-on bags. Before packing a closed can, check your airline's website or contact them directly to confirm it is allowed.

This is especially important if you are traveling internationally or connecting through multiple airports, where different rules may explore at each checkpoint.

Frequently Asked Questions

Can I bring a closed can of soda through TSA security?

Yes, you can bring a closed can of soda through the security checkpoint itself. However, if it is larger than 3.4 ounces — and a standard soda can is 12 ounces — TSA will remove it from your carry-on bag after you pass through security. You can bring it in checked luggage or purchase one after security.

What if I open the can before going through security?

Opening the can does not change TSA's rules. An open can of liquid larger than 3.4 ounces will still be confiscated. The rule applies to the total volume of liquid, not whether the container is sealed.

Can I bring a closed can of paint or other hazardous material?

No. Hazardous materials like paint, paint thinner, aerosols, and flammables are prohibited in both carry-on and checked bags, regardless of whether the can is closed. Attempting to bring these items onto a plane can result in fines or criminal charges.

Are canned foods like beans or vegetables allowed in carry-on bags?

Yes. Solid foods in closed cans are allowed through security and in carry-on bags in any quantity. The 3.4-ounce rule applies only to liquids and gels, not to solid foods.

Can I buy a closed can after security and bring it on the plane?

Yes. Once you pass through the security checkpoint, you can purchase closed cans of any size — soda, juice, water, or other beverages — in airport shops and bring them onto the plane. This is the standard way travelers bring larger cans of liquid onto flights.