This is a life changer!! I use Estée Lauder Double Wear foundation which I love but it has no pump! I read somewhere that this Mac liquid foundation pump would fit and yes it does! IMO it is over priced but I can reuse it hopefully for a very long time. It turns to lock closed and also comes with a top for extra protection against spills. It's just wonderful, can't believe I'm so excited over this... But when you need a pump you need a pump!!! I'll definitely purchase again if anything happens to this one.