Abstract: An air valve apparatus for vacuum sealed containers comprises a cover having a groove at center portion and an aperture at center portion concentrically with respect to the groove. The aperture has projecting a pair of circular walls both from the upper side to receive an air releasing device and from the lower side to receive an anti-dust cover thereon, respectively. The air releasing device has a hollow body and includes a pressing knob at top portion, an integral pin extending downwardly in a distance near a ball which is seating on top of an O-ring which is fitted on top of the aperture to form a hermits seal between the vacuum sealed container and the outside. By pressing the knob downward, the pin will urge the ball to one side that allows air to flow into the container and releases the vacuum status.

Abstract: A structure for automated sticking out and retreating a pipette of a canteen includes a canteen, a canteen cover and a turning cover. A washer is threaded to the hollow, semi-spherical canteen. A bore penetrating the center of a tangent surface at the frond end of the canteen to allow both pipette base and fixing sleeve hold the pipette in position. At one side of the bore is a hollow snapping base with a ventilation outlet on it. In the turning cover which shreds onto the canteen cover, a snapping tab is provided and said pipette sticks out of a circular opening on the turning cover whereby the snapping tab pushes against the pipette to bend into the snapping base for closing up the ventilation outlet thus to achieve a complete leak-proof result and easy operation of the canteen.