They supply shampoo & conditioner, and cream, as well as soap. They are filled up daily, and sometimes twice daily. Whenever the room steward does your room, and if you need extra, all you have to do is ask.
Some people (myself included) find the shampoo not too efficient...lol... If you have thick or curly hair then I would definitely bring my own... For men, I find it fine, but for my dd5, and myself, it does absolutely nothing....