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Yes—gua sha tools can go in carry-on and checked bags; pack facial oils under the 3-1-1 liquids rule and avoid sharp, knife-like designs.

Yes, you can bring a hair straightener in Southwest carry-on; corded types allowed, and cordless or butane tools are carry-on only with safety cover.

Yes, you can bring a guitar amp on a plane; size, weight, and any lithium batteries decide if it rides as carry-on, checked, or cargo.

Yes, hair spray is allowed on planes: 3.4 oz (100 ml) in carry-on; bigger cans belong in checked bags within FAA toiletry aerosol limits.

Yes — a JBL speaker is allowed in carry-on; switch it off, pack it snugly, and keep any spare lithium batteries in the cabin, not in checked bags.

Yes—empty hot water bottles are fine in carry-on and checked bags; filled bottles can’t pass security due to liquid limits.

Yes — TSA allows hair dryers in carry-on and checked bags; cordless models with lithium packs belong in carry-on with any spares protected.

Yes, plug-in electric heaters can go in carry-on or checked; propane or fuel-burning heaters are banned, and battery heat devices face extra limits.

Yes—TSA allows a homemade sandwich in carry-on bags as a solid food, but wet fillings and sauces must follow the 3-1-1 liquids rule.

Yes, a hammer can go in checked luggage; keep it out of carry-on and wrap or sheath the head to prevent damage or injury.