Under the latest regulations, which entered into force at the İstanbul Atatürk Airport and the Sabiha Gökçen International Airport a few days ago, passengers are only allowed to carry up to 100 milliliters of liquids and gels in their hand baggage, providing they are enclosed in a clear sealed plastic bag no larger than 20 centimeters by 20 centimeters. Bottles that exceed 100 milliliters have to be left at security, where passengers are required to show the plastic bag containing liquids and/or gels. They are required to place them in a separate container to pass through the X-ray machines.
There are, however, no limitations placed on liquids in checked baggage. Passengers traveling with babies or young children are allowed to carry enough milk for the duration of the flight, while passengers who are required to take certain medications are also able to take it on board, providing the medicines are in their original containers. Such passengers may be asked by security to demonstrate the safety of the milk by testing it in front of an official and, in the case of sick passengers, sufficient medical documentation proving they need the medicine will be required.