Ubiquitous coffee brand Starbucks is to make its debut at sea on board a new cruise liner, the brand confirmed October 27.

The coffee chain is to open a store on board Royal Caribbean's latest ship Allure of the Seas, which will share the title of the largest cruise liner in the world with its sister ship Oasis of the Seas when it launches this December.

Guests will be able buy everything they expect from a traditional land-based Starbucks on board the liner, with the company's vice president Chris Carr saying that the ship is "another place where our customers want and expect us to be."

Starbucks is the latest chain to move on board the 16-deck, 225,282 ton Allure of the Seas, with fashion retail brand GUESS and pop culture artist Romero Britto also debuting at sea for the first time.

Although Royal Caribbean's Lisa Bauer said that the company was offering "something no other cruise brand can," the positioning of the store inside the ship's huge Royal Promenade could leave passengers wondering if they may as well be buying on land.

For a real cruise experience, the "Baristas" bar on board Marina from Oceania Cruises looks like it will be a better option.

When the ship debuts next year, the coffee bar will overlook the pool deck and provide a stunning vista from the enormous windows.