I'm sure that would work too, maybe the threads wouldn't strip too much after removing and replacing the lid a few times. It would also require ruining a perfectly good bucket though ;-). However if you have one that someone, say a son, daughter, wife, or husband has sat on and broke then by all means it would work very well as you mentioned.
However, DRD was simply asking about reusing the SE buckets that he and I already have. The anchor is already built into the bottom and since it floats upright, there is no worry about it losing its lid or contents.
