A vessel body has an interior cavity in which a liquid is to be contained, an upper hole that communicates with the interior cavity, and a lower hole that communicates with the interior cavity. A spring inside the vessel body is in a pre-loaded condition and that also plugs the upper hole and the lower hole. When the liquid is to be dispensed, the spring is further loaded to thereby simultaneously vent through the upper hole and pour through the lower hole. Other embodiments are also described and claimed.