Yes, you are absolutely allowed to take hairspray on a Royal Caribbean cruise in 2026. Hairspray is classified as a personal grooming item and does not fall under the "prohibited items" list, which focuses on dangerous goods like candles, incense, or large power strips with surge protectors. However, there are two 2026 "best practices" to keep in mind. First, if you are flying to the port, you must follow the TSA 3-1-1 rule for your carry-on (containers 3.4oz or less); if you have a full-sized aerosol can, it must be in your checked luggage. Second, Royal Caribbean encourages guests to use aerosol products in well-ventilated areas, as the sensitive smoke detectors in staterooms can occasionally be triggered by the fine mist of heavy hairspray or "dry shampoo." Unlike irons or steamers, which are confiscated for being fire hazards, hairspray is a standard travel essential that you can keep in your cabin throughout the entire duration of your voyage.