Will it fly?
Can you bring Self-Defense Sprays on a plane?
Coop checked the book. Here's the ruling for Self-Defense Sprays:
CARRY-ON
No
CHECKED BAG
Yes
What the TSA says
One 4 fl. oz. (118 ml) container of mace or pepper spray is permitted in checked baggage provided it is equipped with a safety mechanism to prevent accidental discharge. Self-defense sprays containing more than 2 percent by mass of tear gas (CS or CN) are prohibited in checked baggage. For more information, visit faa.gov. We recommend checking with your airline as some may not allow this item in checked bags.
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Based on official TSA guidance. The final decision rests with the TSA officer at the checkpoint.