On the theme of traveling by (liquid-filled) tube, I have an image to share, courtesy of my friend Bacchus:

It clearly fits into the visual inspiration of the “traveling by tube” post, also seems to fit into the visual aesthetic of Professor Corwin’s Apsinthion device.  (Hard not to think of Anwei, no?) But sadly, neither of us knows much abou the image’s actual provenance.  I for one would dearly love to know, so if you do, please do comment!