There are no rules or policies against bringing unsealed cosmetic and toiletry items onboard, though any bottled water you bring onboard must be factory sealed.

Yes, you can bring full-size shampoo on a Disney Cruise Line ship in 2026, but where you pack it matters immensely. There are no restrictions on the size of liquid toiletries in your checked luggage; the crew will deliver your large suitcases to your stateroom a few hours after boarding. However, if you are carrying a bag onto the ship yourself (your "carry-on"), you are generally subject to standard maritime security screenings. While cruise lines are often more lenient than airlines regarding liquids, the ports themselves frequently follow similar security protocols. To avoid delays during embarkation, it is best to pack full-size bottles in your checked bags and keep only small, travel-sized essentials in your carry-on. It is also worth noting that in 2026, Disney provides high-quality, full-size H2O+ spa products (shampoo, conditioner, and body wash) in every stateroom, so bringing your own may not even be necessary unless you require a specific medicated or salon-grade brand.