Apparently for Listerine bottles only.  Not universal fit.
Seems decently made.<br />I can confirm that this pump  does not mate with Costco's Kirkland brand of mouthwash in the 1.5 liter bottle, No surprise there.  The listing does specify Listerine.  I'll buy :Listerine and reuse the bottle with the Costco or Sams Club mouthwash.
Rating: 4 stars