The cabin is usually pressurized to the equivalent of 8000 ft asl. So the dispenser does have to deal with pressure changes. A simple vent hole aught to take care of that though.
Also, as the safety briefing says, “we do not anticipate a change in cabin pressure,” but if a rapid decompression should occur, there was probably some provision made so that the soap dispenser doesn’t just shatter or explode or something.
The cabin is usually pressurized to the equivalent of 8000 ft asl. So the dispenser does have to deal with pressure changes. A simple vent hole aught to take care of that though.
Also, as the safety briefing says, “we do not anticipate a change in cabin pressure,” but if a rapid decompression should occur, there was probably some provision made so that the soap dispenser doesn’t just shatter or explode or something.