You can bring an empty water bottle aboard most cruise ships, but not a full one
Most cruise lines allow you to bring a reusable water bottle onto the ship at embarkation, but it must be empty when you pass through security. Once you are onboard, you can fill it at water fountains, in your cabin, or at the buffet. Some cruise lines also sell bottled water at the onboard shop, and a few offer complimentary bottled water in your cabin or at certain venues.
The reason for the empty-bottle rule is the same as at airports: security screening. Cruise lines cannot easily test liquids in large quantities, so they prohibit full bottles to prevent prohibited items from entering the ship. An empty bottle takes seconds to clear and costs you nothing.
What you fill your bottle with after boarding depends on your cruise line and cabin type. Standard tap water is safe to drink on all major cruise ships—the water systems are regularly tested and meet or exceed U.S. Environmental Protection Agency standards. If you prefer filtered or bottled water, you can purchase it, or some lines include it as part of premium cabin packages.
Key Takeaways
- Bring an empty reusable water bottle through security; it will be allowed once it passes inspection.
- Fill your bottle at any water fountain, in your cabin, or at the buffet once you are onboard.
- Tap water on cruise ships is safe and tested regularly, so you do not need to purchase bottled water unless you prefer it.
- Some cruise lines include bottled water with certain cabin types or offer it for purchase at the onboard shop.
- Never attempt to bring a full water bottle through security—it will be confiscated and you will lose it.
What happens at security when you bring a water bottle
When you arrive at the cruise terminal, you will go through a security checkpoint similar to airport screening. Your carry-on bags and personal items will be X-rayed, and you will walk through a metal detector. If you have a water bottle, place it in a bin or on the conveyor belt so security can see it is empty.
Security staff will visually inspect the bottle to confirm it contains no liquid. If the bottle is sealed or opaque and they cannot see inside, they may open it to verify. This takes only a few seconds. Once cleared, your bottle goes back into your bag and you proceed to the ship.
If your bottle is full or partially full, security will not allow it through. You will be asked to empty it, pour it out, or leave it behind. There is no exception for water or other beverages, so arriving with a full bottle wastes the contents and your time.
Where to fill your water bottle once you are onboard
Water fountains are located throughout the ship—typically near the buffet, in hallways, in the gym, and near dining areas. These fountains dispense tap water that meets the same safety standards as your cabin tap. You can fill your bottle at any of them without charge.
Your cabin also has a tap with hot and cold water. Many passengers fill bottles in their rooms before heading to activities or the pool. The water pressure and temperature are consistent, and the water is safe to drink.
At the buffet and main dining room, crew members can fill your bottle if you ask. Some ships have dedicated water stations near the buffet where you can serve yourself. If you are unsure where to find water on your specific ship, ask any crew member—they are accustomed to this request and will point you to the nearest source.
Bottled water and premium water options
If you prefer bottled water, most cruise lines sell it at the onboard shop or convenience store. A bottle typically costs between $2 and $4, depending on the line and bottle size. You can purchase a single bottle or a case to keep in your cabin.
Some cruise lines include complimentary bottled water as part of premium cabin packages, such as suites or cabins with balconies. If you booked a higher category cabin, check your cruise documents or contact the cruise line to see what beverages are included.
A few lines offer filtered water stations or premium water options like sparkling water, though these may carry an extra charge. If water quality or type matters to you, review your cruise line's website or call their customer service before you sail to learn what is available and what is included with your booking.
What you cannot bring in a water bottle
Do not attempt to bring alcohol, juice, soda, or any other beverage in a water bottle, even if you label it or claim it is water. Security staff are trained to detect this, and the bottle will be confiscated. More importantly, cruise lines have strict policies against bringing outside beverages aboard, and doing so can result in fines or removal from the ship.
If you want to bring beverages other than water, check your cruise line's policy on outside drinks. Most lines allow a limited amount of wine or beer in your cabin (usually one or two bottles per person), but these must be declared and purchased through the cruise line or brought in original, sealed bottles—not in a water bottle or other container.
Powders, drink mixes, and other substances that dissolve in water are generally allowed in carry-on bags, but do not put them in your water bottle before security. Pack them separately and mix them in your bottle once you are onboard.
Reusable bottles and what works best
A standard plastic water bottle works fine, but a collapsible or foldable bottle takes up less space in your bag if you want to pack it empty. Stainless steel bottles are durable and keep water cold longer, which is useful on warm sea days. Avoid bottles with built-in filters unless you trust the filter—cruise ship tap water does not require additional filtration.
A bottle with a find, leak-proof cap is important because your bag will be handled during boarding and may shift around your cabin. A bottle that leaks can damage your belongings and create a mess. Test your bottle before you pack it.
If you forget to bring a bottle or yours breaks during the cruise, you can purchase a reusable bottle at the onboard shop. It will cost more than a bottle from home, but it is available if you need it.
Frequently Asked Questions
Can I bring a full water bottle through security if I drink it before boarding?
No. Security will not allow a full or partially full bottle through the checkpoint, regardless of when you plan to drink it. You must empty it completely before you reach the security line, or bring it empty from home.
Is tap water safe to drink on cruise ships?
Yes. Cruise ship tap water is regularly tested and meets U.S. Environmental Protection Agency standards. It is safe to drink straight from the tap or fountain. If you have a sensitive stomach or prefer bottled water for taste, you can purchase it, but safety is not a concern.
What if I have a medical condition and need to bring specific water or a beverage?
Contact your cruise line before you sail and explain your medical need. Some lines will make exceptions for documented medical reasons or allow you to bring specific beverages if you provide a doctor's note. Do not assume—call ahead and get written confirmation of what you can bring.
Can I bring a water bottle with a built-in filter?
Yes, as long as it is empty when you pass through security. The filter itself is not a problem. However, cruise ship tap water does not require filtration, so a filter is unnecessary unless you prefer filtered water for taste.
Do I have to buy a beverage package to have access to water?
No. Tap water is always free and available throughout the ship. Beverage packages cover alcohol, soda, coffee, and specialty drinks—not water. You will never be charged for tap water or access to water fountains.