The First Years by Learning Curve Natural Transitions Manual Breast Pump For Comfortable, Quiet and Easy Pumping with 2 Easy Pour Milk Storage Bags, Two 5 oz. Bottles, 2 Storage Caps and Portable Quiet Breast Pump

There is a piece where a small soft plastic sleeve is fitted into a hard one for suction. The problem is that it's very hard to do, and most of the time in the middle of using the pump, they come apart inside the pump and you have to keep putting it back together. Also, because the way the top is made to swivel, it is ridiculously hard to take apart, because the part that has to twist is just a small blue ring which is hard to grip because your hand has to go over the top part that swivels. If you don't have someone with big or strong hands to help you, you may have a hard time taking it apart.