Abstract: A spill-resistant drinking vessel includes a body; a lid housing securable to the body and having a top surface from which a lid seal flange extends downwardly on one side, further having a straw orifice and a vent orifice passing through the lid housing; a vent and seal plate having an integral vent valve and an integral liquid valve and further having a plate seal flange on one side; wherein the first and plate seal flanges are configured to engage with one another to provide a seal between the lid housing and the seal and vent plate; and wherein the vent orifice and the integral vent valve are in fluid communication with one another. An associated method of assembling a spill-resistant drinking vessel is also disclosed.

Abstract: A bottle is provided that incorporates a free flow filter that can passively filter water by the action of gravity as a user drinks from the bottle. The bottle uses an umbrella valve to vent air from the filter into the body of the bottle so that a continuous stream of filtered water is provided by the bottle as water is poured from the bottle. In an embodiment, the umbrella valve moves from a closed position to an open position when at least a threshold pressure is applied to a diaphragm of the valve. When in the open position, air may vent from the filter and into the body of the bottle.