Cap and container

Abstract

Provided is a cap to be mounted to a container body including a mouth that has a container flange part extending radially outward. The cap includes: an inner circumferential member configured to surround the mouth in a circumferential direction; and an outer circumferential member surrounding the inner circumferential member. The inner circumferential member includes: a base part having an annular shape and configured to surround the mouth in the circumferential direction; an inner locking part erected from the base part along a central axis direction of the base part and configured to be locked to the container flange part; and an inner positioning part extending from the base part along the central axis direction of the base part and configured to engage with the outer circumferential member to position the inner circumferential member relative to the outer circumferential member.