Hi folks! :) Before I get in to my reply I just want to say I have been a reader of this site for a while now: You all contribute some fascinating and interesting ideas and discussions and definitely whet my appetite for AC and all things ALIEN! Big thanks to all those involved in the site!
Back on topic: The Urns in the picture above do seem to be in more of a natural /tomb like setting as opposed to a bio mechanical ship . . . Also, I seem to remember the Urns in Prometheus being all the same size, but could be wrong about that, whereas those pictured seem to vary; they also look a lot older and 'worn'.
Makes me think that these perhaps contain the 'original' or sacred goo before it was (possibly) tweaked by the Engineers . . .
However, we don't know what the Urns looked like on the ship David and ES used, if there were any on it at all? Although going on the theory that LV-223 was an installation for producing/altering goo, then you would assume that all ships had Urns as cargo.
A thought provoking image nonetheless . . .