100 ml (3.4 oz) vs 150 ml Liquid Containers on Planes (2026)
100 ml (3.4 oz) containers are permitted in carry-on bags, but 150 ml containers are confiscated even if half-empty. Review TSA liquid rules.
The Decision Verdict (40–60 Words)
Under TSA and international 3-1-1 rules, 100 ml (3.4 oz) containers are permitted in carry-on baggage inside a quart-sized bag, whereas 150 ml (5.0 oz) containers are strictly prohibited at security screening even if they contain only a small amount of liquid.
Detailed Comparison Table
| Comparison Dimension | 100 ml (3.4 oz) Container Allowed | 150 ml (5.0 oz) Container Banned in Cabin |
|---|---|---|
| Screening Basis (Container vs Liquid Volume) Differs by Rule | Container capacity ≤ 100 ml: ALLOWED Source (TSA) | Container capacity > 100 ml: CONFISCATED Source (TSA) |
| Checked Luggage Allowance Identical Standard | Allowed without limit Source (TSA) | Allowed without limit Source (TSA) |
Where Rules Are 100% Identical
To prevent false assumptions, the following standards are shared without difference between all compared parties:
- Both permitted in unlimited quantities in checked luggage
- Medical and infant liquid exemptions apply to both when declared
Key Rule Distinctions Explained
What is the rule for screening basis (container vs liquid volume)?
Security officers evaluate the printed volumetric capacity of the container, not the volume of liquid remaining inside. A 150 ml tube containing only 20 ml of toothpaste will be confiscated.
What is the rule for checked luggage allowance?
In checked luggage, non-hazardous liquids in both 100 ml and 150 ml containers are permitted in any quantity, subject only to airline baggage weight limits.
Traveler Recommendation & Decision Summary
Transfer liquids into travel-size 100 ml bottles or pack full-size 150 ml containers into your checked luggage before security.
Check Your Exact Items
Use our free calculators to verify watt-hours or liquids volume for your flight.
Frequently Asked Questions
Can I bring a 150 ml bottle on a plane if it only has 50 ml of liquid inside?
No. Airport security screening rules worldwide mandate that the container volumetric capacity itself must be 100 ml (3.4 oz) or smaller. Security officers cannot measure residual liquid and will confiscate oversized containers at the checkpoint regardless of how little liquid remains inside.
Official Primary Sources & Citations
- TSA Liquids Rule Verified: 2026-09-03