Drinking container, vent system and method

A drinking container comprising:

• a liquid container;
• and
• a vent system coupled to said liquid container, said vent system comprising:
• a substantially rigid disc portion having a substantially planar lower surface;
• a base portion including a plurality of base vent channels merging into a single, integral uni-directional valve that, in an open position, allows air to enter the liquid container and, in a closed position, prevents liquid flowing out of the container into the base vent channels;
• wherein a combination of the disc portion and the base portion form air vent channels between said planar lower surface of the disc portion and said base vent channels that allow air to enter the container through the valve, and to form liquid openings that allow liquid to exit the container.

A method for manufacturing a vent system for a drinking container, the method comprising:

• providing a substantially rigid disc portion having a substantially planar lower surface;
• providing a base portion including a plurality of base vent channels merging into a single, integral unidirectional valve that, in an open position, allows air to enter the drinking container and, in a closed position, prevents liquid flowing out of the container into the base vent channels;
• and
• coupling said disc portion to said base portion to form air vent channels between said planar lower surface of the disc portion and said base vent channels that allow air to enter the container through the valve, and to form liquid openings that allow liquid to exit the container.