You can carry liquids on a plane with the following general rules applying to hand luggage:

• Each liquid container must be 100 ml (3.4 oz) or less.
• All containers must fit comfortably inside one transparent, resealable plastic bag with a maximum capacity of 1 litre (about 20cm x 20cm).
• You are allowed only one such quart-sized bag per passenger.
• The liquids include drinks, creams, gels, pastes, sprays, and similar substances.
• Larger quantities of liquids must be packed in checked baggage.

There are some exceptions to these rules:

• Liquids bought at duty-free shops or on the plane can exceed 100 ml if they remain sealed in the security bag with the receipt visible.
• Essential medications and baby food/milk can be carried in larger quantities but require documentation and may be subject to additional screening.
• Some UK airports with advanced 3D scanners allow you to keep liquids in your bag without removing them at security, but the 100 ml container limit still applies.

Recent changes aim to eventually increase the liquid allowance to 2 litres per passenger in cabin luggage, with containers of any size allowed, but this is not yet fully implemented and varies by airport. In summary, for most flights in 2025:

• Carry-on liquids: containers up to 100 ml each, all fitting in one 1-litre clear bag.
• Checked baggage: no specific volume limit but subject to airline weight and safety rules.
• Exceptions apply for duty-free, medications, and baby food.

These rules are consistent across the US, UK, and EU airports with some local variations in security procedures