Looking at the house pics, couldn't see any comments about this specific thing, but... what is this black machine to the right in this pic, and also the white thing under the bed???
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Clearly its something that holds water as there's a towel under it, my first guess is a humidifier, but could it be a CPAP that's been moved away from the bedside table when the room was staged? Its a bit of an odd shape for a CPAP, but that little white box looks more like one.
Looking online, a common issue with using a CPAP is that it dries up your airways to the extent that users often have an attachable humidifier for their machine, or buy one for their room.