Bottle with drink-through cap

1. A beverage bottle, comprising:

a vessel portion configured to contain fluid, the vessel portion including an upper end comprising a vessel opening and a lower closed end; and

a cap configured to mate with the upper end of the vessel portion, the cap including:

a front portion comprising a front lip and a back portion comprising a back lip,

an outer sidewall extending about a periphery of the cap between the front portion and the back portion and defining a height of the cap at the back lip and a height of the cap at the front lip,

an inner sidewall that defines a periphery of a cap opening extending through the cap and through which the fluid may flow from the beverage bottle when the cap is mated with the vessel portion, and

a butterfly valve comprising a valve sidewall defining an outer periphery of the butterfly valve, wherein the butterfly valve seats within the cap opening such that the inner sidewall of the cap is adjacent to and extends around the valve sidewall, wherein the butterfly valve is configured (i) to seal the cap opening to prevent the fluid from exiting the beverage bottle when the butterfly valve is in a closed position and (ii) to unseal the cap opening to enable the fluid to exit the beverage bottle when the butterfly valve is in an open position.

2. The beverage bottle according to claim 1 , wherein:

said butterfly valve includes a disc shaped member having a top surface and a bottom surface, wherein the valve sidewall extends between the top surface and the bottom surface of the disc shaped member, the butterfly valve further including a groove extending along the valve sidewall, and an o-ring disposed in and retained by the groove such that the o-ring contacts the inner sidewall of the cap so as to prevent fluid from exiting the beverage bottle via the cap opening when the butterfly valve is in the closed position.

3. The beverage bottle according to claim 2 , wherein the o-ring is configurable to enable the butterfly valve to be positioned in a variable position between the closed position and a maximum open position.

4. The beverage bottle according to claim 2 , wherein the o-ring is a contrasting color from a color of the disc shaped member, thereby enabling a user to readily observe that the butterfly valve is in the open position.

5. The beverage bottle according to claim 2 , wherein when the cap is mated with the upper end of the vessel portion, said butterfly valve includes a pivot point disposed substantially in a middle of the vessel opening.

6. The beverage bottle according to claim 1 , wherein the height of the cap at the front lip is greater than the height of the cap at the back lip, and wherein the butterfly valve is oriented to allow the fluid to exit the beverage bottle from the front portion of the cap.

7. The beverage bottle according to claim 1 , wherein said cap further includes a butterfly valve support structure and wherein the butterfly valve is supported within the cap opening via the butterfly valve support structure.

8. The beverage bottle according to claim 7 , wherein said butterfly valve comprises a hail pair of pivot posts that extend outwardly from opposite sides of said butterfly valve, and wherein the butterfly valve support structure receives the pair of pivot posts to enable said butterfly valve to rotate from the closed position to the open position and vice versa.

9. The beverage bottle of claim 1 , wherein the cap includes a splash guard located at one side of the cap opening to prevent liquid from flowing over the butterfly valve when the butterfly valve is in the open position, and wherein the splash guard includes a vent hole that is exposed to atmosphere when the butterfly valve is in the open position.

10. The beverage bottle of claim 1 , wherein the butterfly valve further comprises a back valve portion and a front valve portion, wherein in the open position the back valve portion extends within and at least partially through the cap opening such that the front valve portion extends above the back valve portion.

11. A bottle cap comprising:

a body comprising a front portion, a back portion, and a periphery defined by an outer sidewall extending between the front portion and the back portion of the body, and an inner sidewall defining a periphery of a cap opening passing through the body; and

a butterfly valve comprising a valve sidewall defining an outer periphery of the butterfly valve, wherein the butterfly valve seats within the cap opening such that the inner sidewall of the body is adjacent to and extends around the valve sidewall, wherein the butterfly valve is configured (i) to seal the cap opening when the butterfly valve is in a closed position, and (ii) to unseal the cap opening when the butterfly valve is in an open position, wherein the butterfly valve is received in pivoting engagement with the body and is pivotable between the open position and the closed position.

12. The bottle cap of claim 11 , wherein the body further includes at least one pivot stop that controls an extent of pivoting of the butterfly valve.

13. The bottle cap of claim 11 , wherein the body further includes a splash guard located at one side of the cap opening.

14. The bottle cap of claim 13 , wherein the splash guard includes a vent hole that is exposed to atmosphere when the butterfly valve is in the open position.

15. The bottle cap of claim 11 , wherein the butterfly valve carries an o-ring about the valve sidewall that provides a seal between the butterfly valve and the inner sidewall of the body when the butterfly valve is in the closed position.

16. The bottle cap of claim 11 , further comprising:

at least one internal pivot stop that controls an extent of pivoting of the butterfly valve; and

a splash guard located internally and at one side of the cap opening,

wherein the body, the at least one internal pivot stop, and the splash guard are a unitary member.

17. The bottle cap of claim 16 , further comprising an outer shell within which is received the body, wherein the body comprises plastic and the outer shell comprises a metallic material.