Can I bring a thermos flask on the plane?

Aug 12,2025

Thermos flasks, as a common type of container, are frequently used to hold liquids. Many people wonder whether they can bring them on a plane. The answer is yes; thermos flasks are permitted on board.

First, we need to understand the airline's regulations regarding carry-on items. Airlines establish these regulations primarily to ensure flight safety and prevent items from causing harm to other passengers or the aircraft. When carrying items, factors such as size, weight, and whether they contain liquids must be considered.

Thermos flasks are not among the items explicitly prohibited on aircraft. However, it is important to note that thermos flasks must not contain liquids, especially when passing through airport security. When going through security, any liquid in the thermos flask must be emptied before proceeding. This is because liquids undergo special screening during security checks to ensure they do not contain any hazardous materials.

Additionally, when carrying a thermos flask, you should also pay attention to its size and weight. While specific regulations may vary by airline, generally speaking, the size and weight of a thermos flask fall within the permissible limits set by airlines. If the thermos flask meets the airline's size and weight requirements, you can safely bring it on board.

During the flight, you can place the thermos in your carry-on luggage or in the storage compartment under your seat. Note that if the thermos has a metal exterior, it may need to be removed separately for security screening to ensure its safety.

In summary, thermoses can be brought onto the plane. However, when carrying them, it is important to follow the airline's regulations, ensure there is no liquid inside the thermos, and that its size and weight meet the airline's requirements. Additionally, it may require additional inspection during security screening. As long as these regulations are followed, you can smoothly bring the thermos on the plane, providing convenience for your journey.

Finally, it is recommended to check the airline's regulations for your flight before bringing a thermos to ensure a smooth trip. If you have any questions, you can consult the airline or check their official website.

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