not a good product
product description does not say you have to modify the bottle cap as the pump does not come with a cap.  It also needs to screw together and the threads want to crossthread.  does not come with any instructions.  I accidentally turned it upside down trying to put it together and the spring and check ball came out.  The ball is very small and went down the sink.  I got it all put back together and it pumps very little.
Rating: 1 stars