What is the difference between a foaming pump dispenser and regular pump dispenser?Updated a year ago

Pumps that dispense foam work by mixing air with the soap creating foam. The neck size of the foam pump is much larger than a regular pump to allow room for the air chamber. The easiest way to know if you have a foam pump is to test it with a diluted solution of water and regular soap or detergent. If it foams, it’s a foam pump!