55 gallon food-grade steel with locking lid:
http://boston.craigslist.org/gbs/bfs/1010165988.html
I'm picking up a few in the morning. Will let you know how that goes.
Update: They're clean and in great condition. Used to transport cranberry juice. The guy selling them says he will have them until March. I could only fit 8 in my long bed truck but I did put two more up in the backseat of my cab.