No. Unless It is on something that responds to heat. Like essential oils. Nut if you secured it and went out, ou won’t smell like mentholated heat rub or vicks or icey hot stuff

How much liquid is inside (are they TSA compliant)?

There is no liquid so I believe it is compliant.

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Description

🔥 Stay Warm, Stay Ready!

EMERGENCY READY - Ideal for hiking, camping, or any outdoor adventure.
USER FRIENDLY DESIGN - Simple squeeze activation for immediate warmth.
LIGHTWEIGHT COMPACT - Easily fits in any first aid kit or travel bag.
INSTANT RELIEF ON THE GO - No heating required—just activate and apply!
VERSATILE PAIN MANAGEMENT - Perfect for joint pain, cramps, and more.

The Primacare PHP-45 Instant Heat Packs come in a convenient 24-pack, designed for emergency heat therapy. Each pack is lightweight, portable, and easy to activate, providing instant relief for various types of pain. Perfect for first aid kits and outdoor activities, these disposable hot packs are a must-have for anyone seeking quick and effective warmth.