While most common in hand soap dispensers (both manual and automatic), foam pumps are also used for:
Skincare products (cleansers, shampoos, shaving cream)
Household cleaners (surface sprays, kitchen cleaners)
Sunscreen and sanitizer applications
In summary, a foam dispenser pump is a clever piece of engineering that uses simple mechanics and precise design to turn ordinary liquid into an efficient, pleasant-to-use foam.