I was brought here by the rumour of a witch, trapped in a silvered glass bottle...
This varies from the usual Witch bottle, which are bottles filled with charms, fetishes, etc, usually laid in a foundation or threshold to keep witches out.
Scroll down and you'll see it:
Link: https://www.prm.ox.ac.uk/agu-nsi-bottle-rowan-loops
This was displayed in a different context as part of 7 part exhibition of "Presence and Absence" by Marina Abramović, who's show you can also view on the website. (Link here: https://www.prm.ox.ac.uk/event/marina-abramovic-pitt-rivers-museum)
I rather love these museums, that bring together objects of great antiquity and curiosity, little totems and trinkets who's ideas and associations far transcend the sum of their parts, and the varied and visually dense arrangement and curation.