01The rules in detail
Formula, breast milk, toddler drinks and baby food (including pouches) are medically necessary liquids in the US, EU, UK and most countries and can exceed 100 ml. Remove them from the bag and declare them; screening may involve opening containers or vapour tests, which you can usually decline in favour of other checks. Frozen ice packs, gel packs and cooling bags for these items are permitted. Some countries limit quantities to what’s needed for the flight plus a margin.
02Tips
- Pack them together in a clear bag for quick inspection.
- Bring more than you need — delays happen.
03Frequently asked
Can I bring baby formula or breast milk in my carry-on?
Yes. Exempt from the 100 ml rule in reasonable quantities for the journey, even without the child present in the US. Declare at security; officers may test or inspect. Ice packs to keep them cool are also allowed.
Can I pack baby formula or breast milk in checked luggage?
Yes. Exempt from the 100 ml rule in reasonable quantities for the journey, even without the child present in the US. Declare at security; officers may test or inspect. Ice packs to keep them cool are also allowed.
Are the rules the same outside the US?
Mostly similar for liquids and batteries, which follow international standards, but sharp objects, tools, lighters and self-defense items vary widely by country. Check the departure airport's rules and the destination's laws.
TSA and other agencies allow officers to refuse any item they judge unsafe, and rules change. This page summarises published guidance as of the verified date; confirm on tsa.gov or your airport's site before packing anything unusual.