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Yes, you can bring a padlock in carry-on; officers may inspect it, and TSA-recognized locks suit checked bags best.

Yes—large dogs can fly, but usually as checked pet or cargo; only trained service dogs may ride in cabin, and strict health and carrier rules apply.

Yes, you can bring a nicotine vape on a plane in carry-on only; keep batteries with you, no charging on board, and never place vapes in checked bags.

Yes — you can fly with a Pack and Play, but it almost always needs to be checked because it won’t fit standard carry-on limits.

Yes—TSA lets solid instant curry packets in carry-ons; curry paste or sauce must obey the 3-1-1 liquids rule, and powders over 12 oz may face extra screening.

Yes, you can bring a metal box on a plane; pack it empty or with permitted items, and be ready to open it for screening.

Yes, you can bring a metal tin on a plane; in carry-on it must be empty or hold items that meet TSA 3-1-1 and screening rules.

Yes—small instruments can fly in the cabin if they fit; larger cases need a seat or go checked.

Yes, you can bring a multitool in a checked bag; sheath blades and don’t pack spare lithium batteries alongside it.

Yes, you can bring a medical syringe on a plane; keep it with the medication, declare it at screening, and place used needles in a sharps container.