Provided is a handle including an annular part configured to fit in a neck part of a container, a first extension part provided so as to be continuous with the annular part, and a first holding part provided so as to be continuous with the first extension part, in which the annular part includes a second contact part capable of coming into contact with a first contact part provided to the neck part, and the first extension part is configured to be positioned with respect to the container by the contact between the first contact part and the second contact part.