In accordance with international safety regulations, any liquids (including aerosols, gels, etc.) carried into the aircraft cabin should be contained in packages of not more than 100 ml (total volume of liquids not exceeding 1 L) and be packed in a securely closed transparent plastic bag - one bag per passenger.
An exception is only necessary medicines (e.g.: for diabetics), baby food, required during the flight.
Liquids purchased in the Duty Free zone do not fall under the general restrictions that apply to the carriage of liquids in the cabin of the aircraft. However, it is strictly forbidden to open the package during the flight. Keep sale receipts from duty-free shops until the end of your flight.