Product review (2 stars): Flimey and Hard to Work With!!  Update. 3/9/17
While this product does the job it does so with difficulty!  The original filter stood up firmly during it's serviceable life fine.  I replaced it with the first of these.  Initially, the filter had a little trouble standing up in the humidifier, after a while it was fine.  Then time for the second filter.  Much harder to stand up even a little bit, it collapsed into the center on itself.  Very, very flimsy!!!

I fixed the problem by cutting the bottom portion of a plastic juice container, just happens to be right size.  I place the container inside the filter and it remains erect and the device is fully functionable!