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Can I bring this on the plane? Instant, region-specific carry-on answers for liquids, electronics, and everyday items — TSA (US), UK, EU, and Australia. Rules vary by airport and can change without notice — always check with your airline and the relevant security authority before travelling.

Can you bring it on the plane? Instant, region-specific carry-on answers for liquids, electronics, and everyday items — TSA (US), UK, EU, and Australia.

Select your departure region
The 100ml / 3.4oz liquids rule All liquids, gels, aerosols, pastes, and creams in carry-on must be in containers of 100ml (3.4oz) or less, stored in a single, clear, resealable plastic bag. Some airports now use advanced CT scanners that remove this restriction — check your specific departure airport.
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Disclaimer: Rules vary by airport and can change without notice. Always check with your airline and the relevant security authority before travelling. When in doubt, pack it in checked baggage. Some airports — particularly major hubs — pilot newer CT scanners with different liquid rules; check your specific departure airport's website if in doubt.
Deep dive · Guide
The 100ml Carry-On Liquid Rule: What You Can and Can't Bring
Learn the underlying topic in depth — practical examples, clear answers, and official-source guidance. Read the guide →
Sources & accuracy

Where this data comes from

Carry-on liquids and security rules are based on the official publications of the relevant authorities: the TSA (United States), the UK Department for Transport, EU aviation security rules, and the Australian government travel security guidance. [Detailed primary-source list: to be documented.]

Last verified: 1 July 2026 · Report outdated information →

Security rules can change and may differ by airport. Always confirm with the relevant authority and your airline before you travel.

FAQ

Carry-on liquids FAQs

Common questions about the 100 ml liquid limit, water bottles, regional differences, and exemptions. Security rules change — always confirm with official sources.

How much liquid can I bring in my carry-on?

Under the 3-1-1 rule and similar limits elsewhere, liquids in carry-on are commonly limited to containers of 100 ml or 3.4 oz or less, fitting in one clear quart or litre bag. Confirm current rules with TSA or your departure airport.

Can I bring a water bottle through security?

Containers larger than 100 ml generally cannot pass through security with liquid inside; empty bottles are usually fine and can be filled airside. Check your airport's rules.

Are the liquid rules different in the UK, EU, and Australia?

Yes. Limits and screening technology vary by country, and some airports now allow larger liquids with advanced scanners. Always verify with the official authority for your departure airport.

What about medicines, baby food, and duty-free liquids?

Essential medicines, baby food and formula, and duty-free liquids in sealed tamper-evident bags are usually exempt from the 100 ml limit, but you must declare them. Confirm with your airport's official guidance.

Security rules change frequently and vary by airport and country. PlanTrippr provides general guidance only — always confirm with TSA or your departure airport's official website.