A multi-purpose syringe that may be used both for gravity feeding and syringe pump assisted feeding of a neonate is disclosed. The multi-purpose syringe includes a cap and a plunger. The cap and plunger may be selectively engaged to the barrel depending on whether the neonate is fed by gravity or syringe pump. The cap seals the top of the barrel but allows gas to pass between the inside of the barrel and the environment and traps liquid within the barrel. To this end, the cap has an aperture covered by a hydrophobic member.