A manual breast pump, including a housing； a funnel connected to the housing and forming a passage for breast milk； a cup for receiving a breast； a lid connected to an upper portion of the housing； a handle assembly connected to the lid； a substantially semi-circular finger grip connected to the housing； a piston movably connected to the handle assembly and reciprocally movable within the housing to create a negative pressure for the expression of breast milk from the breast； a flexible insert sealably secured to the cup and forming an isolated air volume between the cup and the flexible insert. A valve is removably connected to a lower portion of the housing； and a receptacle for receiving the breast milk, the receptacle being removably attached to a lower portion of the housing. The isolated air volume expands and contracts as the piston moves reciprocally within the housing, causing the flexible insert to move.
