I then pushed it way down with a super amount of pressure and held it
This is a very poorly made product. It arrived with the lid attachment broken on one side, but that was just to keep the lid attached, nothing to do with the seal.  However, the lid would not stay sealed, and I had a minor spill. I then pushed it way down with a super amount of pressure and held it, hoping that it just needed continued pressure applied to work.  Nada!  It eased up within 10 seconds and actually completely off the lid.  Worked great standing up....  very disappointing laying down...leaked horribly.  I really had great hopes for this product. If they can actually create it so it works consistently with every product, as it is described in some of the 5 star ratings, it would be an extremely worthwhile product! Send me one when you perfect it and I will rewrite this!
Rating: 1 stars