Beverage container closure

1. A lid for use with a drinking vessel containing a liquid, comprising:

a main body selectively couplable to the drinking vessel, the main body including an upper portion having an opening configured to permit fluid passage therethrough when the lid is coupled to the drinking vessel, the upper portion further including a first engagement portion facing downward toward an interior portion of the main body;

a stopper disposed substantially within the interior portion of the main body and configured for upward displacement into a closed position wherein the stopper engages a portion of the main body and covers the opening to prevent fluid passage therethrough, and downward displacement into an opened position wherein the stopper is spaced apart from the portion of the main body to allow fluid passage through the opening, the stopper having an interior wall forming a stopper opening extending vertically through the stopper, the stopper having a first cam follower and a second cam follower spaced apart from each other on opposite sides of the interior wall;

a stopper cover, for retaining the stopper, comprising a base portion and an elongated member portion extending upwardly therefrom sized to pass through the stopper opening, the elongated member portion terminating with a second engagement portion configured to selectively engage the first engagement portion of the main body, the base portion having a size that is larger than the stopper opening such that the base portion restricts the downward displacement of the stopper and the stopper is maintained substantially within the interior portion of the main body; and

an actuating member movably coupled to the main body and slidably engaged with the stopper, the actuating member being movable inward and outward, and having a first cam surface and a second cam surface spaced apart from each other such that when the actuating member is moved inward the first and second cam surfaces are positioned on opposite sides of the elongated member portion of the stopper cover, the first and second cam followers of the stopper being positioned to simultaneously engage the first and second cam surfaces of the actuating member, respectively, during inward movement of the actuating member to cause the first and second cam surfaces to simultaneously move the first and second cam followers downward which moves the stopper to the opened position, and being positioned such that during outward movement of the actuating member the first and second cam surfaces permit the first and second cam followers, respectively, to move upward which permits movement of the stopper to the closed position.

2. The lid of claim 1 , further comprising:

a stopper biasing member coupled to the stopper and configured to bias the stopper into the closed position in response to outward movement of the actuating member.

3. The lid of claim 2 , wherein the stopper biasing member comprises a spring.

4. The lid of claim 1 , further comprising:

a button disposed on a sidewall portion of the main body, the button being coupled to the actuating member such that pressing on the button moves the actuating member inward.

5. The lid of claim 1 , further comprising:

a stopper biasing member coupled to the stopper and configured to bias the stopper upward into the closed position in response to outward movement of the actuating member; and

an actuating member biasing member operatively coupled to the actuating member and configured to bias the actuating member to move outward and allow the stopper biasing member to move the stopper upward into the closed position.

6. The lid of claim 5 , wherein the actuating member biasing member comprises a spring.

7. The lid of claim 1 , wherein the main body includes a lower portion having threads disposed thereon configured for threaded engagement with the drinking vessel.

8. The lid of claim 1 , further comprising:

a stopper seal disposed over a portion of the stopper, wherein the stopper seal is operative to engage the portion of the main body and cover the opening when the stopper is in the closed position to provide a fluid-tight seal.

9. The lid of claim 1 , wherein the upper portion of the main body further comprises a vent opening, and wherein the stopper further comprises a vent opening engagement portion that engages with a portion of the main body and covers the vent opening when the stopper is in the closed position, and is spaced apart from the vent opening when the stopper is in the opened position.

10. A drinking vessel and lid assembly, comprising:

a drinking vessel; and

a lid comprising:

a main body selectively couplable to the drinking vessel, the main body including an upper portion having an opening configured to permit fluid passage therethrough when the lid is coupled to the drinking vessel, the upper portion further including a first engagement portion facing downward toward an interior portion of the main body;

a stopper disposed substantially within the interior portion of the main body and configured for upward displacement into a closed position wherein the stopper engages a portion of the main body and covers the opening to prevent fluid passage therethrough, and downward displacement into an opened position wherein the stopper is spaced apart from the portion of the main body to allow fluid passage through the opening, the stopper having an interior wall forming a stopper opening extending vertically through the stopper, the stopper having first and second cam followers spaced apart from each other on opposite sides of the interior wall;

a stopper cover, for retaining the stopper, comprising a base portion and an elongated member portion extending upwardly therefrom sized to pass through the stopper opening, the elongated member portion terminating with a second engagement portion configured to selectively engage the first engagement portion of the main body, the base portion having a size that is larger than the stopper opening such that the base portion restricts the downward displacement of the stopper and the stopper is maintained substantially within the interior portion of the main body; and

an actuating member movably coupled to the main body and slidably engaged with the stopper, the actuating member being movable inward and outward, and having first and second cam surfaces spaced apart from each other such that when the actuating member is moved inward the first and second cam surfaces are positioned on opposite sides of the elongated member portion of the stopper cover, the first and second cam followers of the stopper being positioned to simultaneously engage the first and second cam surfaces of the actuating member, respectively, during inward movement of the actuating member to cause the first and second cam surfaces to simultaneously move the first and second cam followers downward which moves the stopper to the opened position, and being positioned such that during outward movement of the actuating member the first and second cam surfaces permit the first and second cam followers to move upward which permits movement of the stopper to the closed position.

11. The drinking vessel and lid assembly of claim 10 , further comprising:

a stopper biasing member coupled to the stopper and arranged to bias the stopper toward the closed position as the actuating member moves outward.

12. The drinking vessel and lid assembly of claim 10 , further comprising:

an actuating member biasing member arranged to bias the actuating member outward.

13. A lid for use with a drinking vessel containing a liquid, comprising:

a main body selectively couplable to the drinking vessel, the main body including an upper portion having an opening configured to permit fluid passage therethrough when the lid is coupled to the drinking vessel, the upper portion further including a main body wall extending downward from the upper portion into an interior portion and having an outer perimeter;

a stopper movably coupled to the main body and disposed substantially within the interior portion thereof, the stopper configured for upward displacement into a closed position wherein the stopper engages a portion of the main body and covers the opening to prevent fluid passage therethrough, and downward displacement into an opened position wherein the stopper is spaced apart from the portion of the main body to allow fluid passage through the opening, the stopper having a stopper wall extending upward therefrom having an inner perimeter that is slightly larger than the outer perimeter of the main body wall such that the stopper wall and the main body wall are permitted to move axially with respect to each other in a telescoping relationship and the main body wall restricts lateral movement of the stopper wall to maintain vertical alignment of the stopper with respect to the main body, the stopper further having first and second cam followers spaced apart from each other on opposite sides of the stopper wall;

a first spring coupled to the stopper and arranged to bias the stopper toward the closed position as the actuating member moves outward;

an actuating member movably coupled to the main body and slidably engaged with the stopper, the actuating member being movable inward and outward, and having first and second cam surfaces spaced apart from each other, the first and second cam followers of the stopper being positioned to simultaneously engage the first and second cam surfaces of the actuating member, respectively, during inward movement of the actuating member to cause the first and second cam surfaces to simultaneously move the first and second cam followers downward which moves the stopper to the opened position, and being positioned such that during outward movement of the actuating member the first and second cam surfaces permit the first and second cam followers to move upward which permits movement of the stopper to the closed position; and

a second spring arranged to bias the actuating member outward.

14. The lid of claim 13 , further comprising:

a button disposed at a sidewall portion of the main body, the button being coupled to the actuating member such that a user may press on the button to move the actuating member inward.

15. A lid for use with a drinking vessel containing a liquid, comprising:

a main body selectively couplable to the drinking vessel, the main body including an upper portion having an opening configured to permit fluid passage therethrough when the lid is coupled to the drinking vessel;

a stopper movably coupled to the main body and configured for upward displacement into a closed position wherein the stopper engages a portion of the main body and covers the opening to prevent fluid passage therethrough, and downward displacement into an opened position wherein the stopper is spaced apart from the portion of the main body to allow fluid passage through the opening, the stopper having a stopper aperture therein extending fully through a vertical axis of the stopper, the stopper further having an actuating member engagement portion comprising one of first and second cam surfaces spaced apart from each other on opposite sides of the stopper aperture and first and second cam followers spaced apart from each other on opposite sides of the stopper aperture;

an actuating member movably coupled to the main body and slidably engaged with the stopper, the actuating member being movable inward and outward, and having a stopper engagement portion comprising the other of the first and second cam surfaces and the first and second cam followers, the actuating member engagement portion of the stopper being positioned to simultaneously engage the stopper engagement portion of the actuating member during inward movement of the actuating member to cause the stopper engagement portion to move the actuating member engagement portion downward which moves the stopper to the opened position, and being positioned such that during outward movement of the actuating member the stopper engagement portion permits the actuating member engagement portion to move upward which permits movement of the stopper to the closed position; and

a stopper cover, for retaining the stopper, comprising a base portion and an elongated member portion extending upwardly therefrom sized to pass through the stopper aperture and to selectively engage a portion of the main body, the base portion having a size that is larger than the stopper aperture such that when the elongated member portion is selectively engaged with the portion of the main body the base portion restricts the downward displacement of the stopper.

16. The lid of claim 15 , wherein the main body includes a lower portion a having coupling configured for selective engagement with the drinking vessel.

17. The lid of claim 15 , wherein the actuating member includes a button disposed on a sidewall portion of the main body.