little rose gold foaming pump bottles 50ml 100ml Operation A foam pump dispenses doses of the liquid contained in the bottle in the form of foam. Foam is created in the foaming chamber. a little bit differerent with lotion pump ,The liquid constituents are mixed in the foaming chamber and this is discharged through a nylon mesh. The neck finish size of a foam pump is bigger than the neck finish size of other types of pumps, to accommodate the foamer chamber. The usual neck size of a foam pump is 28mm 30mm 40mm or 43mm. Where hair-coloring products previously contained instructions to vigorously shake the product, squeeze the bottle, and turn upside-down to disperse the product, foamers do not require any such actions] Some foaming dispensers include suction on the bottom to allow the container to remain upright. Foamers can be purchased alone, or filled with a liquid product like soap. When the liquid is mixed with air, the li…