You can take liquids on an airplane in containers of 3.4 ounces (100 milliliters) or less each. All these containers must fit into a single, transparent, resealable plastic bag with a maximum capacity of 1 liter (approximately 20cm x 20cm) per passenger. This bag must be presented separately at security screening

. Key points to remember:

• Liquids include drinks, gels, creams, pastes, aerosols, and similar substances.
• Containers larger than 100ml are not allowed in carry-on baggage, even if partially full, except for certain exemptions.
• Exemptions apply for essential medicines, baby food, and duty-free liquids purchased in sealed security bags.
• Frozen liquids are generally not allowed unless they are completely frozen solid.
• You are limited to one such plastic bag per passenger.
• Larger quantities of liquids should be packed in checked luggage

In summary, the standard rule for liquids in carry-on luggage is the "3-1-1" rule: containers no larger than 3.4 oz (100 ml), all fitting in one quart- sized (1 liter) clear bag, one bag per passenger