A closure for a container of the kind use to deliver milk and juice. The closure is a two-piece construction comprise of a lid and a base. The closure preferably has overall dimensions that approximate a standard unitary cap use with the same containers, so that the closure can easily be used with standard feeding equipment in a bottling facility. The closure has a hinge that is formed of a post connected by a tab to the lid, and hinge supports extending upwardly from the closure's base. The hinge supports include a hook and a bridge. The hook allows the tab to slide under the hook during assembly of the lid to the base. Once the tab is positioned between hook and the bridge, the hook blocks disassembly of the lid from the base. The post of the hinge assembly fits within tunnel sections formed by the hook and the bridge, and gripping forces applied by the hook and/or bridge hold the lid in an open position when contents are poured from the container. In an alternative embodiment, the post of the hinge has a rounded protrusion extending axially along the length of the post. A ledge on the upper surface of the base is engaged by the rounded protrusion to hold the lid in a partially open position.