Pics
Yep, them's the ones!
Though it seems the mask with rebreather/resevoir bags are disappearing from aircraft as I now see more without the bag than with. Perhaps because of the reasons mentioned above that they confuse crew as to what they actually do? Would be interested to know why they seem to be getting changed out.
Is it possible that the confusion is because the term reservoir/rebreather is being used interchangeably?