Pressure-reducing bottle cover

A cap in combination with a portable and hand-held container having a bottom wall, sidewalls, a container cavity defined by the bottom wall and sidewalls, and a distal end defining a distal opening in fluid communication with the container cavity, wherein an improvement comprises:

• a cap body removably coupled to the distal end of the container in a hermetically sealed configuration and having:
• a wrapper and a muselet retaining a muselet cap coupled to the cap body;
• a first terminal end and a second end opposite the first terminal end of the cap body;
• a button disposed on the first terminal end of the first terminal end of the cap body and having a lower surface;
• a cap channel defined and surrounded by the cap body, the cap channel having a first channel end disposed at the first terminal end of the cap body and a second channel end opposing the first channel end;
• and
• a gas discharge port defined on an outer surface of the cap body and in fluid communication with the first channel end;
• and
• a valve assembly disposed within the cap channel and having a valve stem with a distal valve end and a spring operably configured to bias the valve stem in a direction toward the lower surface of the button, the valve stem having:
• a static position along a stem translation path with the distal valve end disposed proximal to the lower surface of the button, the wrapper superimposing a portion of the cap body, the muselet, the muselet cap, and the button, and with the valve assembly in hermetically sealed configuration with the cap body to fluidly uncouple the first channel end and the container cavity;
• and
• a gas-evacuation position along the stem translation path with the button in a depressed position directly coupled to the distal valve end to fluidly couple the first channel, the container cavity, and the gas discharge port.

A method of relieving gas within an internal cavity of a container, the method comprising:

• providing a container with a cap body directly coupled, through an outer surface of the cap body, to an internal surface of a distal end of the container to hermetically seal an internal cavity of the container from an ambient environment, the cap body defining and enclosing a cap channel with a valve assembly, including a longitudinally biased valve stem with a distal end, disposed therein and hermetically sealing a first channel end of the cap channel with an internal cavity of the container;
• providing rigid nodule cover selectively removably coupled to the cap body and superimposing the first channel end of the cap channel;
• providing a muselet, having a muselet cap defining a muselet cap aperture, and a wrapper superimposing a portion of the cap body, the muselet cap aperture, and the rigid nodule cover;
• removing a portion of the wrapper and the rigid nodule cover from the cap body to expose the first channel end of the cap channel and the distal end of the valve stem;
• depressing and longitudinal translating the distal end of the longitudinally biased valve stem in a stem translation path to fluidly couple the first channel end, the container cavity, and the ambient environment, thereby discharging a gas housed within the container cavity;
• and
• removing the cap body to expose a distal opening of the container defined by the distal end of the container.