Guide

Yes—at most airports a 200-ml liquid can’t go in carry-on; pack it in checked bags (or use lanes that permit up to 2-litre containers).

Yes — 70% rubbing alcohol is allowed: 3.4 oz (100 ml) per bottle in carry-on, and up to 500 ml containers (max 2 L total) in checked bags.

Yes, a 9V battery is allowed on planes; non-lithium 9V cells may go in carry-on or checked, while spare lithium 9V batteries must stay in carry-on.

Yes—100 ml perfume is allowed in carry-on under the 3-1-1 liquids rule and in checked bags within FAA toiletry limits.

Yes—JetBlue lets you bring a backpack as your personal item plus one carry-on; Blue Basic also includes a free carry-on across routes.

Yes—through-checked baggage works on one ticket with interline partners; on separate tickets, you usually must claim and recheck between flights.

No, a 50,000mAh power bank exceeds 160Wh, so it isn’t allowed on passenger flights; only smaller banks within limits may ride in carry-on, never checked.

Yes — if it’s a solid stick, you can carry any size; liquids, gels, or aerosols at 3.5 oz must go in checked bags under the deodorant rules.

Yes, on most airlines you can bring one carry-on plus one personal item; some basic fares only allow one small underseat bag.

Yes, you can bring two perfumes on a plane; keep each bottle at 100 ml or less in your quart bag, and place larger bottles in checked bags.