![Gates Foundation Toilet Challenge Will Change the Portable Sanitation Industry](https://cole-promonthly.imgix.net/https%3A%2F%2Fwww.promonthly.com%2Fuploads%2Fimages%2Fpsai_news_-_karleen_kos_170822_122357.jpg?crop=focalpoint&fit=crop&fp-x=0.5&fp-y=0.5&h=620&ixlib=php-1.1.0&q=75&w=1024&s=b5f34c251be425cd0212a1cfb88082ce)
Little boxes on the hillside,
Little boxes all the same.
There’s a green one and a pink one
And a blue one and a yellow one,
And they’re all made out of ticky tacky
And they all look just the same.
-Malvina Reynolds, as sung by Pete Seeger
When that song was popular...