An aerator for aerating a liquid as the liquid is being poured from a container includes an aerator body configured to be at least partially inserted into the container. The body includes an inlet, an outlet, and a flow control chamber disposed between the inlet and the outlet. A flow control element is movably disposed in the flow control chamber between a first position where the flow control element is spaced away from a stop and a second position where the flow control element engages the stop. The flow control chamber communicates with the outlet when the flow control element is in the second position allowing liquid to be poured from the container and allowing air to be introduced into the flow control chamber for mixing with the liquid being poured from the container to aerate the liquid being poured from the container.