All cabins get something. Concierge etc get the lightweight not quite re-useable not quite disposable one. Aqua get a draw string spa bag thingy and suites get the more robust one. It is a bit hit and miss (suites) if you get the zipped one with the internal pouch which is blue or the non zipped grey one. Exactly when they turn up is also something of a guessing game - sometimes in the room on arrival, sometimes on the bed at turn down before the first port, sometimes on the bed at turndown on the firsl chic. If you haven't got one and want one just ask - although it may be lurking in a drawer somewhere!