I've never seen a coffee machine. You can have coffee/tea delivered via room service. No need to bring a kettle.
Life is too short to let the ship of your dreams sail without you.
Carnival Destiny Feb. 2006
Carnival Fascination Feb. 2007
Royal Caribbean Grandeur of the Seas Feb. 2008 The DTW & MsBJ tour
Carnival Valor MsBJ and Dina Feb. 2009
Carnival Glory MsBJ and Dina Feb. 2010
Carnival Dream MsBJ and Dina Feb. 2011
I think Independence of the Seas has an electric kettle in the room because they are based out of Southampton. To the best of my knowledge, it is the only ship in their fleet that offers this (it is also the only one to have heated pools)
April 1, 2006 - Serenade of the Seas - 7 days to the Southern Caribbean
October 8, 1984 - NCL Sunward II - 3 day cruise to the Bahamas
CCL Inspiration 09
RCCL Explorer of the Seas Eastern 09
CCL Miracle Southern '08
RCCL Enchantment of the Seas Western '07
PCL Caribbean Princess Eastern '05
RCCL Explorer of the Seas Western '05
RCCL Explorer of the Seas Eastern '04
CCL Destiny Southern '01
CCL Sensation Eastern '94
CCL Ecstacy Western '92
CCL Jubilee Eastern '90
Although it doesn't specifically list "tea kettle" it does list coffee maker so I'd expect a kettle to be illegal too since it is the same principle of operation.
Whether ships have approved kettles or coffee makers in the cabins can depend on the itinerary and passenger demographics. For instance, last summer on our Alaskan cruise, the Rhapsody had a kettle in all the cabins because it had just moved from the Far East where the largely oriental crowd pretty much demanded them according to the crew (I asked). I don't know if they ever got around to removing them.
Hi, we just got off Brilliance and a kettle was supplied in our stateroom (we weren't in a suite). This is the first time in 5 cruises we've had this, I wish we'd known and I would have brought coffee as only teabags, sugar and creamer were supplied.
Radiance of the Seas San Diego to Vancouver
June 2010 Vision of the Seas Stockholm, Tallinn, St. Petersburg
January 2010 Golden Princess Hawai
May 2009 - Brilliance of the Seas Egypt and Eastern Med
September 2008 - Serenade of the Seas Alaska
December 2007 - Freedom of the Seas Eastern Caribbean
June 2007 - Voyager of the Seas Mediterranean
December 2005 - Explorer of the Seas Western Caribbean