Just a heads up that the prop store of London will be selling real Prometheus props starting in January, so now's the time to start saving if you loved the film and would love a piece of it.
I wouldn't mind getting one of those canisters with the goo myself :p
Haven't bought one of the canisters yet but I did pick up this from the PSL. Just a tiny piece that can be seen around the movie on various doors.
I saw the canisters on an auction site and simply couldn't believe the price they were going for? I figure they're full of good whiskey..lol. Good luck on your purchase if you get there.