There is complimentary tea/coffee/kettle etc in your cabin. You can also get tea/coffee/squash/water free of charge in the restaurants. Soft drinks like coke etc would be paid for. Re sea sickness. A positive mental attitude - ie you will be absolutely fine works wonders. I take travel wrist bands and a supply of travel sickness tablets from the chemist as a precaution - although I've never taken any on the three cruises I've done to date. If all else fails you can get an injection from the ship's doctor - which they will charge you for - but money well spent if you need it.
Please try to forget about feeling ill and enjoy your holiday - apart from your first day of sailing the main sailing times are at night when you will be having a fantastic time on board seeing shows, having wonderful meals and enjoying the night life. Have a great time.
Yes you can buy bands for your wrists to wear or you can buy seasick pills on ship i would try your chemist might be cheape.
We went on the Med in Aug/Sept and did have a few rough days, best advice is go prepared, we took the wristbands and tablets, which help greatly.
Dont worry about sea sickness. ihave been on many cruises and have not sufferd yet but if you are worried buy a wrist band from boots as they are very good.all tea and coffe in rooms are free. we have been on the ov 4 times and loved it every time great shi.