You can take liquids on a plane under the following general rules and exemptions:

Standard Liquid Rules for Carry-On Luggage

• Liquids, gels, and aerosols must be in containers of 100 ml (3.4 ounces) or less.
• All containers must fit comfortably in a single, transparent, resealable plastic bag with a maximum capacity of 1 litre (about 20cm x 20cm).
• Each passenger is limited to one such plastic bag.
• The bag must be presented separately at security screening.
• Liquids include drinks, soups, jams, creams, lotions, perfumes, toothpaste, gels, sprays, contact lens solutions, and similar substances

Exemptions to the 100 ml Rule

• Liquids purchased at the airport duty-free or on the plane can be taken in carry-on luggage even if they exceed 100 ml, provided they remain sealed in the security bag with the receipt visible and unopened until the final destination

• Essential medicines and creams are allowed in larger quantities if accompanied by a doctor's note or prescription. These must be declared and may be opened for screening

• Baby food, milk, sterilised water, and breast milk can be carried in reasonable quantities exceeding 100 ml if you are traveling with a baby. Breast milk up to 2 litres can be carried even without a baby present

• One cigarette lighter is allowed on board but must be kept on your person, not in luggage, and presented in a clear bag at security

• Frozen items like ice packs are allowed if completely frozen when passing through security; partially thawed items with liquid may be refused

Additional Notes

• Frozen liquids are generally not allowed in hand luggage

• Alcoholic beverages have restrictions based on alcohol content and container size, especially for checked luggage

• Powdered substances have specific restrictions on some flights, particularly to the USA

Summary

You can carry:

• Liquids in containers of 100 ml or less in one clear resealable bag (max 1 litre).
• Duty-free liquids purchased at the airport or on the plane in sealed bags.
• Essential medicines and baby-related liquids in reasonable quantities with documentation.
• One lighter on your person.
• Frozen items if fully frozen.

Always check the specific airport and airline rules before traveling, as some airports have started relaxing the 100 ml limit to allow up to 2 litres in hand luggage, but this is not yet universal

. This ensures compliance with security regulations while allowing you to carry necessary liquids on board.