William A. Mitchell's Unsuccessful Inventions

Not all of Mitchell's inventions were successful. Failed inventions included Dacopa, a coffee substitute made from roasted dahlia tubers, and the "dessert-on-the-stick," a thick starch-based dessert. His patented carbonated ice never became a thing.

Though some of Mitchell's inventions are still popular, his style of science foods has fallen out of favor and organic, slow food trends are taking its place.