A closure (24) comprises: a base (50) for mounting to a container body neck； a cover (52)； and a hinge (54) coupling the cover to the base. The base comprises: an inner sidewall (60) bearing a feature (140) for engaging the neck； an outer sidewall (62) spaced apart from the inner sidewall； an upper web (64) coupling the inner sidewall to the outer sidewall； and a first aperture (150) in the upper web. The cover comprises a latching tab (92). The cover has a closed condition wherein the latching tab extends into the first aperture in the upper web.
