First-Time Cruisers

Distilled Water for a CPAP on a Cruise Ship: What Each Line Provides

Published 20 April 2026 · 2 min read · Cruise Questions Canada editorial team

Quick answerMost major cruise lines can provide distilled water for CPAP machines on request — typically arranged through the line's accessibility desk before sailing or via your stateroom attendant on board, free on some lines and for a small charge on others — but supply varies by ship, so bring enough in your carry-on for the first night and confirm the arrangement when you notify the line about your machine.

A CPAP's humidifier wants distilled water, and the ship's tap water isn't it — so the question matters every night of the cruise.

The general answer

Every major line can usually supply distilled water to CPAP users, but the mechanism and the price vary: free via the stateroom attendant on some, a charged delivery on others, arranged through the accessibility desk on most. The safe plan is to request it when you register the machine and carry a first-night supply regardless.

Line by line

Each line's arrangement — which desk to contact and what to expect — is on its own page: Royal Caribbean, Carnival, Norwegian, Princess, Celebrity, Holland America, MSC and Disney.

How much you'll need

A typical humidifier uses roughly 250–350 ml a night; a week's cruise needs about two to three litres. Two one-litre bottles in your carry-on covers the first nights while the ship's supply is arranged.

Through security

Medical liquids are routinely allowed through cruise terminal security in reasonable quantities — tell the screener it's for a CPAP. Airlines are stricter; buy the water at your destination before heading to the port if you've flown in.

Buying it in port

Pharmacies and supermarkets near Vancouver, Seattle, Fort Lauderdale and Miami ports stock distilled water; a pre-night hotel stop makes it easy, as covered in Fly In the Day Before Your Cruise.

If supply runs short

Bottled drinking water is a workable substitute for a night or two (clean the humidifier chamber afterward); most lines will find more distilled water with a day's notice.

The rest of the setup

Extension cords, outlets and registration are covered in Can You Bring a CPAP Machine on a Cruise Ship.

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Getting it noted before you sail

Water, cord and machine registration are one request to the line's accessibility desk — easiest made through whoever holds your booking at the time you book.

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Frequently asked questions

Is distilled water free on cruise ships for CPAP users?

On some lines yes, on others a small charge applies, and on a few ships supply is limited — confirm with the line's accessibility desk when you register the CPAP, and treat a first-night bottle in your carry-on as non-negotiable.

Can you bring distilled water through cruise terminal security?

Generally yes in reasonable quantities for medical use — a gallon or two in your carry-on is routinely accepted at North American terminals, unlike the general bottled-water limits.