Help with Warthogs third exam

[Jaguartail]

I'm trying to pass the potions exam on Warthogs, but I don't see the 'rainbow vial that's ready to explode' mentioned by the walkthrough at crystalshard.net. Could someone point out where exactly in the alchemy lab the rainbow vial is (screenshot would be great)? Thanks.

[Jaguartail]

Never mind, figured it out. For anyone else that wants to know, its the large jar on the right.