I think Kandor is Superman canon. I'm not a comic book expert, but I'm pretty sure that Kandor was a bottled city that Superman rescued from Krypton. But I'm fuzzy on the details...
Kandor was a Kryptonian city that was stolen and miniaturized by Brainiac before the destruction of the planet. Later, Superman recovered the city and kept it at the Fortress in a bottle

until he finds a way to restore its size. I have to say the Smallville version would make more sense (if it was just their DNA that was kept in a capsule). But Kandor was literally a bottled city.
![[Linked Image]](http://static.comicvine.com/uploads/original/5/52074/1630604-bottle.gif.gif)