Spill resistant container lid

Abstract

A container lid for placement on the mouth of a container is designed to prevent the unwanted removal of fluids from the container. The container lid includes a beverage dispensing chamber having an open first chamber end, a closed second chamber end and at least one chamber sidewall extending from the first chamber end to the second chamber end. The beverage dispensing chamber includes a spout chamber which includes an open end and a closed end connected by a wall. The wall includes a valve slit which forms a valve flap having a memory closure mechanism to render the valve slit effectively impermeable to fluid absent force upon the valve slit.

What is claimed is: 
     
         1 . A container lid for placement on a container, comprising:
 a. a beverage dispensing chamber having an open first chamber end, a closed second chamber end and at least one chamber sidewall extending from the first chamber end to the second chamber end, wherein the beverage dispensing chamber includes:
 i. a spout chamber, comprising a spout edge portion and an interior edge portion adjacent the open first chamber end of the beverage dispensing chamber; and 
 ii. a valve slit positioned on the chamber sidewall, the valve slit forming a valve flap, wherein the valve flap comprises a memory closure mechanism to render the valve slit effectively impermeable to fluid absent force upon the valve slit. 
   
     
     
         2 . The container lid of  claim 1  further comprising:
 a. a first lid end comprising a channel to removably attach and sealingly engage the container lid to the container; 
 b. a second lid end comprising a spout edge; 
 c. an exterior side wall extending from the first lid end to the second lid end; 
 d. an interior planar surface; and 
 e. an interior side wall extending from the interior planar surface to the second lid end. 
 
     
     
         3 . The container lid of  claim 2  comprising a mouthpiece including the spout edge. 
     
     
         4 . The container lid of  claim 2  comprising a circular container lid wherein the diameter of the first lid end is greater than the diameter of the second lid end. 
     
     
         5 . The container lid of  claim 1  further comprising a ventilation opening positioned on the second lid end. 
     
     
         6 . The container lid of  claim 1  wherein the force upon the valve slit is vacuum force. 
     
     
         7 . The container lid of  claim 1  wherein the container lid is a one-piece container lid. 
     
     
         8 . The container lid of  claim 1  wherein the valve flap is formed from a single cut valve slit. 
     
     
         9 . The container lid of  claim 1  wherein the valve flap is formed from a multiple cut valve slit. 
     
     
         10 . A container lid for placement on a container, comprising:
 a. A first lid end comprising a channel to removably attach and sealingly engage the container lid to the container;   b. a second lid end comprising a spout edge;   c. an exterior side wall extending from the first lid end to the second lid end;   d. an interior planar surface;   e. an interior side wall extending from the interior planar surface to the second lid end; and   f. a beverage dispensing chamber positioned on the second lid end, the beverage dispensing chamber having an open first chamber end, a closed second chamber end and at least one chamber sidewall extending from the first chamber end to the second chamber end, wherein the beverage dispensing chamber includes:
 i. a spout edge portion positioned on the first lid end adjacent the spout edge and an interior edge portion, wherein the spout edge and the interior edge portion form a spout chamber, and 
 ii. a valve slit positioned on the chamber sidewall, the valve slit forming a valve flap, wherein the valve flap comprises a memory closure mechanism to render the valve slit effectively impermeable to fluid absent force upon the valve slit. 
   
     
     
         11 . The container lid of  claim 10  comprising a mouthpiece including the spout edge. 
     
     
         12 . The container lid of  claim 10  comprising a circular container lid wherein the diameter of the first lid end is greater than the diameter of the second lid end. 
     
     
         13 . The container lid of  claim 10  further comprising a ventilation opening positioned on the second lid end. 
     
     
         14 . The container lid of  claim 10  wherein the force upon the valve slit is vacuum force. 
     
     
         15 . The container lid of  claim 10  wherein the container lid is a one-piece container lid. 
     
     
         16 . The container lid of  claim 10  wherein the valve flap is formed from a single cut valve slit. 
     
     
         17 . The container lid of  claim 10  wherein the valve flap is formed from a multiple cut valve slit.