Over a recent 5 day period, I visited 4 full service Marriotts and 1 Courtyard. All had some variation of bottled water in the room. I think all had one or two small bottles of water available free of charge (maybe one didn't ) Several also included larger bottles with hang tags indicating how much would be charged to the room if they were consumed. The price was somewhere in the $3-4 range (I didn't look took closely as I had no intention of purchasing).
I did partake of the free bottles of water at least half the time.
What has been your experience with bottled water during Marriott stays? Did you buy? Would you? Or will you only drink the free stuff?