A bottle cap pump is a type of dispensing pump that is designed to be fitted onto a standard bottle cap, allowing the bottle to be used as a dispenser. It typically consists of a pump mechanism that is attached to a cap, which is screwed onto the top of the bottle.Bottle cap pumps are commonly used for dispensing liquids such as hand soap, shampoo, conditioner, lotion, and other personal care products. They offer several advantages over traditional screw-on caps, including more precise dispensing, reduced mess and waste, and greater ease of use.