Abstract: A dispensing closure for a vessel comprising a base member engageable with the vessel and a flip top spout member defining a flow channel. The spout member engaged with the base member and pivotable relative to the base member for dispensing fluid from the vessel. The spout member including a rupture membrane and the base member having an actuator for rupturing the rupture membrane during pivoting of the spout member to define a flow opening in the base member in fluid communication with the flow channel and to permit fluid flow through the flow opening. The spout member defining a vent positioned to be in communication with the flow opening when the spout member is pivoted to the flow position to permit air to pass through the vent channel. The rupture member configured to prevent fluid from passing into the vent channel.