“Cordless hair straighteners that contain lithium metal or lithium ion batteries or are gas or butane fueled are only allowed in carry-on bags,” a notice on the TSA website states. “A safety cover must be securely fitted over the heating element. The device must be protected from accidental activation.”

TheStreet reported a new ban on these items in checked luggage: cordless curling irons or flatirons containing gas cartridges; butane-filled curling irons and flatirons and gas refill cartridges for these tools. If TSA agents find these items, they may be confiscated.