Abstract: A spill resistant cap for a container, such as a commercially available water or other beverage bottle, includes a cap body that forms a mating fit with the container and a spout having liquid dispense holes that allow fluid to flow out of the container. A removable valve is sized to fit within the cap body. The valve includes a valve mechanism that opens in response to a pressure differential applied across the valve face, such as the mouth suction applied to the spout when a person attempts to drink from the container, allowing fluid to flow through the valve and through the liquid dispense holes in the spout.