i have had 2 shipped to me. 1 useing a 5 gallon stain bucket, the other useing a milk crate. both held up pretty well. the milk crate maybe better if it is reinforced a little on the bottom.
The best type bucket to use is a chlorine 12 gal bucket with a screw lid. I take and cut a piece of plywood in a round shape to reinforce the bottom. I've shipped many like this.
