Etsy user Digitalsoaps has created these clever Tetris-shaped soap bars. They are sold here for $10 a set.
For people with OCD like me, you might get some fulfillment from trying to make these Tetris pieces fit perfectly together before washing your hands of them....mwahahah. Inspired by level 3, with purple and green pieces.
Some of the sizes may be easier to use for handwashing than others.
