Yes, you are allowed to bring a vape or e-cigarette on a Princess cruise in 2026, but their use is strictly regulated by the line's onboard smoking policy. Vaping is prohibited in all staterooms, including on private balconies; violation of this rule can result in a significant cleaning fee of $250 or more. Furthermore, vaping is not allowed in most public indoor areas, such as theaters, dining rooms, or lounges. Instead, you must use designated smoking zones, which are typically located in specific outdoor deck areas or within the casino (while actively playing). When traveling, you should pack your vaping device and any spare lithium batteries in your carry-on luggage, as these are prohibited in checked bags due to fire safety regulations. E-liquids should be kept in your quart-sized liquids bag for security screening. It is also wise to check the local laws of your ports of call, as some countries in 2026 have implemented much stricter bans on the import or public use of electronic nicotine delivery systems.