How long do you figure it takes to break even on that though? If you're going through cups fast enough that cleaning them is slowing you down, that math might work, but for most of us a cup can get cleaned a whole lot of times before it's anywhere near done. That old timer probably had a shop where time was money on every job and buying cups by the box was nothing. I've watched guys toss cups that still had plenty of life left and it adds up quick over a year. A good soak and a brush keeps them going way longer than people give them credit for. Cleaning is cheap, cups are not, so I'll keep scrubbing mine.