The pumps are mostly distinguished by a single user or regular users. No need to buy a single user pump if you’re about to rent one.  If you’re about to borrow or hire a breast pump, check carefully if it’s for multiple uses. Single-use pumps aren’t an ideal option since the breast milk inside makes it difficult to clean the parts. Moreover, this milk can contain bacteria and even viruses that are likely to cause severe health problems. When you see the pump is labeled as having multiple uses, this risk no longer exists because its design prevents the milk from getting inside the pumping motor.