
When travelling with hand luggage, there are restrictions on the amount of liquids you can take. Liquids must be in containers that are no larger than 100ml and must be placed in a transparent, resealable plastic bag. While some sources suggest that sandwich bags can be used, the rules are not always enforced, and it may depend on the airport and the individual staff member. It is recommended to use a bag that is specifically designed for liquids, as these are usually made to be leakproof and sturdy. These bags can often be found at supermarkets or pharmacies.
| Characteristics | Values |
|---|---|
| Container size | Containers must be no larger than 100ml. Some airports may allow containers holding up to 2 litres. |
| Bag type | The bag must be a single, transparent, resealable plastic bag. |
| Bag size | The bag must hold no more than a litre and measure approximately 20cm x 20cm. |
| Bag contents | Contents must fit comfortably inside the bag so it can be sealed. |
| Bag availability | Bags are usually provided for free at the airport. |
| Own bag usage | Using your own sandwich bag is possible, but may depend on the airport and security staff. |
| Duty-free liquids | Duty-free liquids must be sealed inside a security bag with the receipt visible. |
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What You'll Learn

Sandwich bags are allowed, but must be a certain size
Sandwich bags are allowed for carrying liquids when passing through airport security, but they must meet certain criteria. The bags should be made of plastic and be transparent or mostly transparent. They should be resealable, with a zip or press seal, and able to be closed comfortably.
The size of the bag is important. Most sources state that the bag should be approximately 20cm x 20cm, although one source suggests that a bag measuring 18cm x 20cm is also acceptable. The bag should hold no more than a litre and should not be too rigid, as this may cause issues with airport staff.
It is worth noting that some airports provide bags for liquids, although these may be of lower quality and intended for single use. It is recommended to bring your own bag to avoid potential issues.
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Some airports provide bags, but they may not be sturdy
While some airports provide bags for storing liquids, these may not be sturdy enough for long-term use. Some travellers prefer to bring their own bags, which they find sturdier and more reliable. For example, one person reported that they were not allowed to use their own bag at Stansted Airport, but were forced to use a self-seal bag provided by the airport. Another traveller reported that the bags provided by Tripadvisor as a promotional gift were too rigid to hold many items and were rejected by the TSA due to the amount of writing on them.
In addition, some travellers have reported that the bags provided by airports may not be suitable for storing liquids for extended periods. One person noted that the bags provided by airports are designed for carrying items through security rather than for long-term storage.
To avoid any issues, it is recommended to check the rules of your departure airport before travelling. Some airports provide information on their websites or via phone regarding the type of bags allowed for liquids. It is also a good idea to use a bag that is slightly bigger than necessary to allow for some extra room.
Some travellers have reported success using ordinary sandwich bags, while others prefer to purchase their own slider-type bags, which they find sturdier and less likely to leak. It is important to ensure that the bag is transparent, resealable, and within the size limit specified by the airport.
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Bags must be transparent, resealable, and hold no more than a litre
When packing liquids in your hand luggage, it is important to follow the guidelines for the containers and bags you use. Most airports require liquids to be in containers no larger than 100ml. These containers should be placed in a single, transparent, resealable plastic bag, which holds no more than a litre and measures approximately 20cm by 20cm. The bag should be easy to seal and contents must fit comfortably inside.
Sandwich bags are commonly used for this purpose and are generally accepted, as long as they meet the size and transparency requirements. Some travellers prefer to use these bags as they are often sturdier and easier to seal than the bags provided by airports. However, it is worth noting that some airports may have specific rules regarding the type of bag allowed. For example, Stansted Airport requires the use of their self-seal bags. It is always a good idea to check the guidelines of your departure airport before travelling.
The bag you use should be made of transparent plastic, allowing security staff to easily see and scan the contents. While some airports may provide these bags, it is recommended to bring your own to ensure you have a suitable option. Bags with a slider or zip closure are often preferred, as they are less likely to leak or accidentally open. It is also important to consider the size of the bag, ensuring it can accommodate all your liquid containers without being too large for the allowed limit.
In addition to the size and transparency requirements, it is crucial that the bag can be resealed. This ensures that the contents remain secure and do not spill or leak during your travels. It also facilitates the screening process, as airport security staff may need to open and inspect the liquids inside. By using a resealable bag, you can easily close it after inspection and continue on your journey.
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Containers inside must be 3.4oz/100ml or less per item
When travelling with liquids, it's important to adhere to the regulations regarding container size. Containers holding liquids must be 3.4 ounces (100ml) or less in volume per item. This rule applies to all liquids, gels, aerosols, creams and pastes that passengers intend to carry in their hand luggage. It is imperative that travellers abide by this regulation, as non-compliance may result in delays or even confiscation of items at airport security.
The 3.4-ounce (100ml) restriction is a widely recognised standard for carry-on liquids. This regulation is in place to ensure the safety and security of all passengers and staff. By limiting the volume of liquids carried onboard, authorities can mitigate potential risks associated with certain substances. This measure helps maintain a secure environment during flights.
When packing liquids for air travel, it is essential to use containers that meet the specified size requirement. Travellers should ensure that each individual container holds no more than 3.4 ounces (100ml) of liquid. This rule applies regardless of how full the container is; even if it is only partially filled, it must adhere to the specified volume limit. Passengers should carefully examine their containers and confirm that they meet the required standards before arriving at the airport.
It is worth noting that some airports may have slightly different regulations regarding liquid container sizes. While the vast majority of airports adhere to the 3.4-ounce (100ml) rule, there may be rare exceptions. Some airports might allow containers holding up to 2 litres of liquid. However, it is always advisable to check the specific rules and guidelines of your departing airport before packing liquids in your hand luggage. This proactive approach can prevent any unexpected issues during security screening.
To summarise, travellers must ensure that each individual container holding liquids or similar substances does not exceed 3.4 ounces (100ml) in volume. This regulation is a crucial aspect of air travel security and should not be overlooked. By following this rule and staying informed about specific airport guidelines, passengers can contribute to a smooth and safe travel experience for everyone onboard.
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Duty-free liquids must be in a secure, tamper-proof bag
Liquids, gels, aerosols, creams and pastes must be 3.4 ounces (100ml) or less per container to be allowed in your carry-on luggage. These items must be placed in a single, transparent, resealable plastic bag, which holds no more than a litre and measures approximately 20cm x 20cm.
If you are carrying duty-free liquids, they must be in a secure, tamper-proof bag. These bags are known as STEBs (Sealed Tamper-Evident Bags). STEBs are designed to secure LAGs (Liquids, Aerosols, and Gels) purchased at airport duty-free stores. They are crucial for airport security, ensuring that liquids and other restricted items remain tamper-proof during air travel. STEBs are distinct in design, often featuring security seals, clear labelling, and anti-tamper security tape. They are also transparent, allowing security staff to screen the liquid.
When purchasing duty-free liquids, ensure that the shop staff seals the STEB correctly. The bag should be sealed, undamaged, and include a receipt inside. This proof of purchase is required at security checkpoints. It is important to handle the bag with care and avoid damaging or breaking the seal. Do not open the STEB until you reach your final destination.
Some airports may allow you to take liquids in containers up to 2 litres. Exemptions may apply for liquids such as baby milk or food, medicines, and food for special dietary requirements. However, these containers may need to be placed in a separate, transparent bag.
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Frequently asked questions
Yes, you can use a sandwich bag for airport liquids, as long as it is transparent, resealable, and no larger than 20cm x 20cm.
The plastic bag must be approximately 20cm x 20cm and hold no more than one litre.
Yes, you can purchase dedicated liquid bags at most airports, or use other types of plastic bags such as Ziploc bags or slider bags.
If you do not separate your liquids, you may be asked to remove them from your carry-on luggage and place them into a provided bag. In some cases, you may not be allowed to bring the liquids through security.
Liquids, gels, aerosols, creams, and pastes must be placed in a separate bag. Each container must be no larger than 3.4 ounces (100ml) and fit comfortably inside the bag.











































