A breast pump mimics the sucking rhythm of your child, so you can collect breast milk. That's useful, because you can use the breast pump to build up a stock of milk, or you can maintain the milk production when you're working again. There are 2 types of breast pumps. You can choose between a manual pump or an electric pump. A manual pump is silent and compact, but you can pump faster with an electric pump. With an electric pump, you can choose between a single or double pump. A double breast pump pumps faster and often collects more breast milk than a single breast pump. With a hands-free breast pump, your hands are free during pumping.