the greatest thing since sliced bread

The benchmark for greatness and idiomatically highlighting something clever that just works, especially a recent innovation was introduced into common parlance on this day in 1928 when the bread slicing machine of inventor Otto Frederick Rohwedder (a prototype he had developed back in 1912 was destroyed in a fire and it took nearly sixteen years to make a second go at it) was used by the Chillicothe Baking Company of Chillicothe, Missouri in the United States and sold their first pre-sliced loaves. The more common German equivalent is, however, das Größte seit der Erfindung der Bratkartoffel, the greatest invention since roasted potatoes.