For air and cruise travel, you can't pack items that violate the rules set by the Transportation Security Administration (TSA). The rules for carry-on luggage are stricter than the rules for check-in luggage. Some items such as toothpaste and perfume are allowable, but only in small quantities. As these rules change periodically, it's a good idea to check the official TSA list before leaving home. Some of the items you can't pack in carry-on luggage include: Aerosol insecticide. Self-defense items, including firearms, BB guns, and pepper spray. Sporting goods. Sharp objects, including scissors and knives. Some of the items you can't pack in check-on or carry-on luggage include: Flammable items, such as paints and lighter fluid. Chemicals, including bleach and fertilizers. Explosive items. Alcoholic beverages over 140 proof.