'fraid I'll have to get back to you on that. It was 1998 or 1999, and I got them from the same supplier I bought the 55 gallon plastic drums from. They are drums, smaller of course, and with a handle on top, but the same bungs as the larger ones. I'm sure most of the suppliers have them, but I'll look for the info on the one I used.

BE AWARE, however, that there's a reason most suppliers don't carry "portable" 15-gallon containers. The weight of the water alone is 120 pounds, plus the weight of the container itself. You're not going far with that on foot...