Choosing the breast pump that's right for you depends on how often you plan to use one and how much time you can devote to pumping. If you work full time and have to find time to pump during a busy workday, you'll want to use a fully automatic pump so you can pump both breasts at the same time. But if you only need to pump a few ounces occasionally so your partner can feed the baby while you're out for a short while, an inexpensive manual pump may do just fine.