Simply put, our foamer lids are stylish, economical, fun to use, and extremely popular! They instantly turn a regular mouth pint size (or smaller) mason jar into a foaming soap dispenser. Foamer pumps help you to save money because they allow you to massively dilute your liquid soap before using. A good rule of thumb is to add 4 to 5 parts water for every 1 part of liquid soap used. A real money saver!