What is Not Allowed in a Plane Carry-On Bag, From Magic 8 Balls to Baseball Bats
Briefly

The TSA enforces a 3-1-1 rule for carry-on liquids, allowing only containers under 3.4 ounces in a single quart-sized bag. This aligns with the international 100ml limit.
As bag screening technology improves, the hope is to eliminate the 100ml liquid limit. However, differing timelines for new machines mean this rule will likely remain.
Travelers need to ensure that liquids, gels, and aerosols are packed according to TSA guidelines, focusing on non-flammable items and proper sizing for compliance.
When preparing for a flight, packing according to TSA regulations can save travelers from the stress of having items confiscated or rejected during security screening.
Read at Conde Nast Traveler
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