Airport security in Canada is run by CATSA, which publishes the current rules for liquids, aerosols and gels in carry-on bags. Rules can change, so treat this guide as orientation and confirm on CATSA’s website before you travel.
The rule in plain terms
Liquids, gels and aerosols in carry-on bags have to be in containers of 100 mL (3.4 oz) or less, and the containers go together in one clear, resealable bag. The limit applies to the container size, not to how much is inside it, so a half-empty 200 mL bottle is still too large.
Packing tips
- Use a clear bag that closes properly. Keep it on top of your bag for the tray.
- Decant into labelled small bottles. Silicone tubes are squeezable and refillable.
- Leave space. Pressure changes can push liquid out of an overfilled bottle.
- Keep medically necessary liquids accessible. They have separate guidance on CATSA’s site.
Go solid to avoid the issue
| Liquid | Solid or low-volume alternative |
|---|---|
| Shampoo and conditioner | Bars |
| Body wash | Soap bar and a small case |
| Toothpaste | Tablets or a travel tube |
| Deodorant | Stick deodorant |
See our picks in Toiletry bags & bottles.
Water bottles
Carry an empty bottle through security and fill it after. A collapsible bottle makes this easy.
If you check a bag
You can bring larger containers in checked luggage, but pack them in sealed bags in case of leaks, and check the airline’s list of prohibited items.
Frequently asked questions
Does the 100 mL rule apply to the amount or the container?
The container. A bottle larger than 100 mL is not permitted in a carry-on even if it is only partly full.
Are solid toiletries restricted?
Solids such as soap bars and shampoo bars are not liquids, but check CATSA’s current guidance.
What should I check before travelling?
Review the current screening instructions for your departure airport and airline, then use our pre-flight checklist to check liquids, batteries and your packed bag.
Information here is general and can go out of date. Confirm airline rules with the airline before you travel. See our methodology.