I had this happen just last week at the Renaissance Hotel in Hollywood, CA, also with one of the bottles of water left out in the room. Fortunately I caught the charge before I checked out and they were fine about removing the charge on my bill. Something like this seems to happen relatively often, perhaps once out of every dozen stays at various hotels.

While I know one should always review every hotel bill for errors, it's unfortunate that things like this seem to be a regular cause of problems. Also, even if you can fix the problem before checking out, having to do so does take away the convenience of express checkout.