A spring loaded nipple assembly includes a cover including a top wall and a perimeter wall that is attached to and extends downwardly from the top wall. The perimeter wall has a cylindrical shape and the top wall has a central opening extending therethrough. A nipple is integrally coupled to the top wall and extends upwardly therefrom. The nipple extends around the opening and forms a seal around the opening. The nipple has a distal end with respect to the top wall and the distal end has an aperture extending therethrough. A threading engagement member is positioned on an inner surface of the perimeter wall. The threading engagement member engages threading on a neck of a fluid container.
