Guess I have to destroy two Mr. Handy's and any others I receive...oh what a sad day!
Or.... you could just not open their boxes until you need them. Which could be never. They'll just sit there, boxed.
I wonder what would happen if you sent two of them out into the Wasteland, then opened the boxes? Could you ever collect from those out exploring?
Sure. When one returns, send another out in it place. Or, build a single wide power plant on its own level, and store it there.